1 pcs White Opal - 11.92 ct - International Colored Gemstone Association (ICA GemLab) - **Celestial-Prism-Magic**

06
days
18
hours
35
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30
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Starting bid
€ 1
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Purificacion Aquino Garcia
Expert
Selected by Purificacion Aquino Garcia

Holds a gemmology degree from IGE Madrid and an MBA from University of Santiago de Compostela.

Retail Estimate  € 650 - € 800
No bids placed

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Description from the seller

***INT-REF LOT NUMBER: UL-014-0004/WHIT-OVAL-OPAL***

Mesmerizing White Opal (11.92) Ct - Play-of-Color - ICA GemLab Certified Gemstone
═══════════════════════════════════════════════════════

■ ABOUT THIS (11.92) Ct MESMERIZING WHITE OPAL:
- - - - - - - -

● Captivating 11.92-carat white opal displaying legendary play-of-color phenomenon
● Stunning flashes of orange, yellow, and green dancing across milky white body
● Classic oval cabochon cut measuring 19.85 x 15.39mm showcasing optimal color play
● Perfect transparency revealing mesmerizing rainbow fire throughout entire stone
● Investment-grade specimen exhibiting opal's most celebrated optical phenomenon

■ CERTIFICATE DETAILS - ICA GEM LAB
──────────────────────

ICA Gem Lab Report Number: TH25G114901; Pin: 9781
───────────────────────────
SPECIES ..................... Natural Opal
WEIGHT .................... 11.92 cts
DIMENSIONS ............ 19.85 x 15.39 x 8.89 mm
CUT ............................. Cabochon /
SHAPE ........................ Oval
COLOR ....................... White
TRANSPARENCY ........ Transparent
PHENOMENA ............... Play-of-Color
TREATMENTS............... See Comments
ORIGIN....................... Ethiopia (Seller's opinion; premier sources for white opal with vibrant play-of-color from sedimentary deposits where silica spheres arrange in precise patterns creating legendary rainbow fire phenomenon prized by collectors worldwide)

■ ORIGIN & GEOLOGICAL CONTEXT:
- - - - - - - - - - - - - - - - - - - - - - -

● Opal forms from silica-rich solutions depositing microscopic silica spheres in precise arrangements
● Play-of-color results from light diffraction through ordered silica sphere arrays acting as natural prisms
● Natural opal species representing millions of years of silica deposition and water content stabilization
● Sourced from premier opal deposits in Australia, Ethiopia, or Mexico renowned for finest play-of-color
● White opal with vibrant multi-color flash represents classic material highly prized by collectors worldwide

■ MARKET INSIGHT:
- - - - - - - - - - - - - -

● Play-of-color opals command significant premiums over common opal without color phenomenon
● White body with orange-yellow-green flash offers exceptional brilliance against light background
● Substantial 11+ carat size provides impressive presence perfect for statement rings or pendants
● ICA certification with "Play-of-Color" designation provides authentication and enhances investment value
● Appeals to opal collectors seeking vibrant color play, designers creating unique pieces, and investors valuing natural optical phenomena

■ METAPHYSICAL PROPERTIES:
- - - - - - - - - - - - - - - - - - - - -

● Known as "Stone of Cosmic Consciousness" and amplifier of emotions and spiritual experiences
● Ancient Romans believed opal contained virtues of all gemstones due to rainbow color display
● Enhances creativity, inspiration, and spontaneity while encouraging emotional expression
● Stimulates originality and dynamic creativity while releasing inhibitions
● Treasured worldwide by anyone seeking creative awakening, emotional liberation, spiritual vision, and joyful spontaneity

■ WHY THIS WHITE OPAL IS EXTRAORDINARY:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

✓ PLAY-OF-COLOR - Legendary optical phenomenon displaying rainbow fire unique to finest opals
✓ Multi-Color Flash - Orange, yellow, and green creating vibrant spectral display
✓ Substantial Size - 11.92 carats offers impressive presence for statement jewelry
✓ Classic White Body - Milky background provides perfect canvas for color play visibility
✓ Cabochon Excellence - Oval dome cut maximizing play-of-color phenomenon display
✓ ICA Certified - Full gemological authentication confirming natural opal with play-of-color
✓ Natural Porosity - Authentic characteristic allowing potential weight variation with humidity

Comments:
───────

This stone exhibits white with play of orange, yellow and green. Due to its natural porosity, this gemstone may absorb liquids and as a result its weight and appearance may change.

PLAY-OF-COLOR PHENOMENON: The spectacular rainbow flashes result from light diffraction through microscopic silica sphere arrays within the opal's structure. Unlike simple body color, play-of-color is an optical phenomenon that appears to dance and shift as the stone moves - this is opal's most celebrated and valuable characteristic, elevating it far above common opal without color play.

NATURAL POROSITY DISCLOSURE: Opal's natural porosity is an inherent characteristic of this gemstone species, not a defect. This porosity can cause slight weight fluctuations with humidity changes and allows the stone to potentially absorb liquids. This is normal for natural opal and demonstrates authenticity. Proper care includes avoiding prolonged water exposure and storing in moderate humidity.

COLOR PLAY SIGNIFICANCE: The presence of orange, yellow, and green flashes against white body represents classic precious opal. This multi-color display indicates well-ordered silica sphere arrangements creating optimal diffraction patterns. The variety of colors visible demonstrates the quality of the internal structure.

TREATMENT TRANSPARENCY: The "See Comments" treatment status reflects opal's natural characteristics. Any treatments to stabilize or enhance opal would be disclosed. The porosity comment confirms this is natural opal with authentic characteristics rather than synthetic or heavily treated material.

CARE RECOMMENDATIONS: Opal requires gentle care due to water content and porosity. Avoid harsh chemicals, ultrasonic cleaners, extreme temperature changes, and prolonged water immersion. Store in moderate humidity away from heat sources. Clean gently with soft cloth. These precautions ensure long-term beauty and play-of-color preservation.

Clarification on "See Comments" treatment disclosure: When a certificate states "See Comments" under treatments, this provides important information about the stone's natural characteristics. The porosity comment confirms this is authentic natural opal. We sell all stones with full transparency and competitive market pricing.

=====================================================================
For a detailed Certificate Report Please copy and paste this link in your Browser:

https://app.scaglobal.com/verify?report=TH25G114901&date=10%2F07%2F2025&pin=9781&tenant=888888

Or Scan the QR code in the images.
=====================================================================

Please read the below Information's and terms for your better understanding. Thank you.
----------------------------------------------------------------------------------------
Photography & Image Accuracy:
--------------------------------
- While our HD photos provide detailed static views, we highly recommend watching the included videos for a true-to-life depiction of the gem's dynamic qualities, including color shifts, brilliance, refractive index, light play, and luster in motion.
- All items are photographed individually using professional DSLR/macro equipment in controlled lighting (LED, daylight-balanced ~5000K).
- Photos are not heavily edited; minor cropping may be applied to represent the gem accurately.
- Images may reveal inclusions or features in greater detail than the naked eye—please examine them carefully.

Grading & certification:
-----------------------
- Our gems are certified by ICA GemLab (International Colored Gemstone Association), a globally respected gemological laboratory. Certificates include species, variety, weight, dimensions, color, clarity, treatments, and detailed comments. Authentication links are provided to verify each report online. Please read the certificate comments carefully—especially regarding treatments and treatments authenticity.
- Each item bears a unique identification number engraved on the Certificate, correlating with our internal inventory system for full traceability and authenticity.

Treatments & Disclosure:
------------------------
- All treatments (or lack thereof) are disclosed based on laboratory findings. If no enhancements are reported, the gem is natural and untreated.
- Laboratory reports may state "Color authenticity is currently undeterminable" for certain gemstones, reflecting current gemological testing limitations—not evidence of treatment. We adhere to international disclosure standards.
- For heated or irradiated gems, standard trade practices apply, with full transparency provided on certificates.

Our practices:
--------------
- We source carefully, prioritizing natural, untreated stones whenever possible. Where treatments exist, we disclose them transparently in accordance with international best practices.
- Natural, untreated stones are increasingly rare and command premium prices—a reality reflected across the global gemstone trade.

Packaging & Presentation:
--------------------------
- Loose gemstones ship securely bubble-wrapped and cushioned within sturdy parcels to ensure safe transit.
- Jewelry items arrive in elegant presentation boxes suitable for gifting.
- Certificates and documentation are included with every shipment.

Shipping & Handling:
--------------------
- We ship worldwide via priority courier (FedEx, DHL, EMS, or similar), with tracking and insurance included for high-value items.
- Processing time: Orders ship within 1–3 business days after payment clears (unless noted otherwise). For expedited dispatch, message us before purchase.

Shipping options & transit:
--------------------------
- Express Priority: 1–3 business days. (Additional shipping cost involved - Message us if needed)
- Standard Priority: 3–7 business days.
- Regional/economy options: Available on request.
Ask for quotes on shipping-only vs. shipping + insurance. High-value items are insured by default; optional insurance for others upon request.

Customs & taxes:
-----------------
- Import duties, VAT, and clearance fees are the buyer's responsibility—we cannot predict or control these. In countries like France, Portugal, or the Canary Islands, a local customs broker may be needed; arrange in advance if applicable.

Insurance & claims:
-------------------
- High-value shipments are insured. If lost or damaged, notify us immediately, retain packaging, and we'll assist with claims. Refuse delivery if the parcel shows visible damage.

Combined shipping:
--------------------
- Free for multiple wins—pay the first lot and message us with lot numbers within 48 hours to consolidate and update your invoice.

Cancellations & returns:
-----------------------
- Contact us first. Returns accepted with prior approval within 7 days of receipt; items must be unworn and in original packaging with certificates. Buyer pays return shipping unless misdescribed.

Claims & resolution:
-------------------
- Reach out for any issues—we resolve disputes promptly and fairly.

Payment & verification:
----------------------
- We accept international payments via Payoneer. Items ship after verification; additional ID may be requested for high-value orders.

Seller's Story

“Gemleaf Global brings over 35 years of heritage and expertise to the international gemstone trade. Since 1990, we have operated from Bangkok, Hong Kong, and Singapore, supplying exceptional gemstones to collectors, jewelers, and connoisseurs worldwide. We specialize in rare and investment-grade Paraiba tourmaline, morganite, ruby, emerald, sapphire, and premium semi-precious stones—responsibly sourced from leading mining regions across Brazil, Africa, Sri Lanka, and beyond. Our longstanding partnerships with miners and master cutters allow us to offer gemstones of exceptional beauty, provenance, and value. To better serve the global collector community, we established our dedicated online division exclusively for Catawiki. Here, we deliver the same uncompromising standards trusted by our wholesale clients for decades: certified gemstones, professional photography, transparent pricing, and complete authenticity. Every stone we offer reflects our unwavering commitment to excellence—because your confidence remains the foundation of our continued success.”

***INT-REF LOT NUMBER: UL-014-0004/WHIT-OVAL-OPAL***

Mesmerizing White Opal (11.92) Ct - Play-of-Color - ICA GemLab Certified Gemstone
═══════════════════════════════════════════════════════

■ ABOUT THIS (11.92) Ct MESMERIZING WHITE OPAL:
- - - - - - - -

● Captivating 11.92-carat white opal displaying legendary play-of-color phenomenon
● Stunning flashes of orange, yellow, and green dancing across milky white body
● Classic oval cabochon cut measuring 19.85 x 15.39mm showcasing optimal color play
● Perfect transparency revealing mesmerizing rainbow fire throughout entire stone
● Investment-grade specimen exhibiting opal's most celebrated optical phenomenon

■ CERTIFICATE DETAILS - ICA GEM LAB
──────────────────────

ICA Gem Lab Report Number: TH25G114901; Pin: 9781
───────────────────────────
SPECIES ..................... Natural Opal
WEIGHT .................... 11.92 cts
DIMENSIONS ............ 19.85 x 15.39 x 8.89 mm
CUT ............................. Cabochon /
SHAPE ........................ Oval
COLOR ....................... White
TRANSPARENCY ........ Transparent
PHENOMENA ............... Play-of-Color
TREATMENTS............... See Comments
ORIGIN....................... Ethiopia (Seller's opinion; premier sources for white opal with vibrant play-of-color from sedimentary deposits where silica spheres arrange in precise patterns creating legendary rainbow fire phenomenon prized by collectors worldwide)

■ ORIGIN & GEOLOGICAL CONTEXT:
- - - - - - - - - - - - - - - - - - - - - - -

● Opal forms from silica-rich solutions depositing microscopic silica spheres in precise arrangements
● Play-of-color results from light diffraction through ordered silica sphere arrays acting as natural prisms
● Natural opal species representing millions of years of silica deposition and water content stabilization
● Sourced from premier opal deposits in Australia, Ethiopia, or Mexico renowned for finest play-of-color
● White opal with vibrant multi-color flash represents classic material highly prized by collectors worldwide

■ MARKET INSIGHT:
- - - - - - - - - - - - - -

● Play-of-color opals command significant premiums over common opal without color phenomenon
● White body with orange-yellow-green flash offers exceptional brilliance against light background
● Substantial 11+ carat size provides impressive presence perfect for statement rings or pendants
● ICA certification with "Play-of-Color" designation provides authentication and enhances investment value
● Appeals to opal collectors seeking vibrant color play, designers creating unique pieces, and investors valuing natural optical phenomena

■ METAPHYSICAL PROPERTIES:
- - - - - - - - - - - - - - - - - - - - -

● Known as "Stone of Cosmic Consciousness" and amplifier of emotions and spiritual experiences
● Ancient Romans believed opal contained virtues of all gemstones due to rainbow color display
● Enhances creativity, inspiration, and spontaneity while encouraging emotional expression
● Stimulates originality and dynamic creativity while releasing inhibitions
● Treasured worldwide by anyone seeking creative awakening, emotional liberation, spiritual vision, and joyful spontaneity

■ WHY THIS WHITE OPAL IS EXTRAORDINARY:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

✓ PLAY-OF-COLOR - Legendary optical phenomenon displaying rainbow fire unique to finest opals
✓ Multi-Color Flash - Orange, yellow, and green creating vibrant spectral display
✓ Substantial Size - 11.92 carats offers impressive presence for statement jewelry
✓ Classic White Body - Milky background provides perfect canvas for color play visibility
✓ Cabochon Excellence - Oval dome cut maximizing play-of-color phenomenon display
✓ ICA Certified - Full gemological authentication confirming natural opal with play-of-color
✓ Natural Porosity - Authentic characteristic allowing potential weight variation with humidity

Comments:
───────

This stone exhibits white with play of orange, yellow and green. Due to its natural porosity, this gemstone may absorb liquids and as a result its weight and appearance may change.

PLAY-OF-COLOR PHENOMENON: The spectacular rainbow flashes result from light diffraction through microscopic silica sphere arrays within the opal's structure. Unlike simple body color, play-of-color is an optical phenomenon that appears to dance and shift as the stone moves - this is opal's most celebrated and valuable characteristic, elevating it far above common opal without color play.

NATURAL POROSITY DISCLOSURE: Opal's natural porosity is an inherent characteristic of this gemstone species, not a defect. This porosity can cause slight weight fluctuations with humidity changes and allows the stone to potentially absorb liquids. This is normal for natural opal and demonstrates authenticity. Proper care includes avoiding prolonged water exposure and storing in moderate humidity.

COLOR PLAY SIGNIFICANCE: The presence of orange, yellow, and green flashes against white body represents classic precious opal. This multi-color display indicates well-ordered silica sphere arrangements creating optimal diffraction patterns. The variety of colors visible demonstrates the quality of the internal structure.

TREATMENT TRANSPARENCY: The "See Comments" treatment status reflects opal's natural characteristics. Any treatments to stabilize or enhance opal would be disclosed. The porosity comment confirms this is natural opal with authentic characteristics rather than synthetic or heavily treated material.

CARE RECOMMENDATIONS: Opal requires gentle care due to water content and porosity. Avoid harsh chemicals, ultrasonic cleaners, extreme temperature changes, and prolonged water immersion. Store in moderate humidity away from heat sources. Clean gently with soft cloth. These precautions ensure long-term beauty and play-of-color preservation.

Clarification on "See Comments" treatment disclosure: When a certificate states "See Comments" under treatments, this provides important information about the stone's natural characteristics. The porosity comment confirms this is authentic natural opal. We sell all stones with full transparency and competitive market pricing.

=====================================================================
For a detailed Certificate Report Please copy and paste this link in your Browser:

https://app.scaglobal.com/verify?report=TH25G114901&date=10%2F07%2F2025&pin=9781&tenant=888888

Or Scan the QR code in the images.
=====================================================================

Please read the below Information's and terms for your better understanding. Thank you.
----------------------------------------------------------------------------------------
Photography & Image Accuracy:
--------------------------------
- While our HD photos provide detailed static views, we highly recommend watching the included videos for a true-to-life depiction of the gem's dynamic qualities, including color shifts, brilliance, refractive index, light play, and luster in motion.
- All items are photographed individually using professional DSLR/macro equipment in controlled lighting (LED, daylight-balanced ~5000K).
- Photos are not heavily edited; minor cropping may be applied to represent the gem accurately.
- Images may reveal inclusions or features in greater detail than the naked eye—please examine them carefully.

Grading & certification:
-----------------------
- Our gems are certified by ICA GemLab (International Colored Gemstone Association), a globally respected gemological laboratory. Certificates include species, variety, weight, dimensions, color, clarity, treatments, and detailed comments. Authentication links are provided to verify each report online. Please read the certificate comments carefully—especially regarding treatments and treatments authenticity.
- Each item bears a unique identification number engraved on the Certificate, correlating with our internal inventory system for full traceability and authenticity.

Treatments & Disclosure:
------------------------
- All treatments (or lack thereof) are disclosed based on laboratory findings. If no enhancements are reported, the gem is natural and untreated.
- Laboratory reports may state "Color authenticity is currently undeterminable" for certain gemstones, reflecting current gemological testing limitations—not evidence of treatment. We adhere to international disclosure standards.
- For heated or irradiated gems, standard trade practices apply, with full transparency provided on certificates.

Our practices:
--------------
- We source carefully, prioritizing natural, untreated stones whenever possible. Where treatments exist, we disclose them transparently in accordance with international best practices.
- Natural, untreated stones are increasingly rare and command premium prices—a reality reflected across the global gemstone trade.

Packaging & Presentation:
--------------------------
- Loose gemstones ship securely bubble-wrapped and cushioned within sturdy parcels to ensure safe transit.
- Jewelry items arrive in elegant presentation boxes suitable for gifting.
- Certificates and documentation are included with every shipment.

Shipping & Handling:
--------------------
- We ship worldwide via priority courier (FedEx, DHL, EMS, or similar), with tracking and insurance included for high-value items.
- Processing time: Orders ship within 1–3 business days after payment clears (unless noted otherwise). For expedited dispatch, message us before purchase.

Shipping options & transit:
--------------------------
- Express Priority: 1–3 business days. (Additional shipping cost involved - Message us if needed)
- Standard Priority: 3–7 business days.
- Regional/economy options: Available on request.
Ask for quotes on shipping-only vs. shipping + insurance. High-value items are insured by default; optional insurance for others upon request.

Customs & taxes:
-----------------
- Import duties, VAT, and clearance fees are the buyer's responsibility—we cannot predict or control these. In countries like France, Portugal, or the Canary Islands, a local customs broker may be needed; arrange in advance if applicable.

Insurance & claims:
-------------------
- High-value shipments are insured. If lost or damaged, notify us immediately, retain packaging, and we'll assist with claims. Refuse delivery if the parcel shows visible damage.

Combined shipping:
--------------------
- Free for multiple wins—pay the first lot and message us with lot numbers within 48 hours to consolidate and update your invoice.

Cancellations & returns:
-----------------------
- Contact us first. Returns accepted with prior approval within 7 days of receipt; items must be unworn and in original packaging with certificates. Buyer pays return shipping unless misdescribed.

Claims & resolution:
-------------------
- Reach out for any issues—we resolve disputes promptly and fairly.

Payment & verification:
----------------------
- We accept international payments via Payoneer. Items ship after verification; additional ID may be requested for high-value orders.

Seller's Story

“Gemleaf Global brings over 35 years of heritage and expertise to the international gemstone trade. Since 1990, we have operated from Bangkok, Hong Kong, and Singapore, supplying exceptional gemstones to collectors, jewelers, and connoisseurs worldwide. We specialize in rare and investment-grade Paraiba tourmaline, morganite, ruby, emerald, sapphire, and premium semi-precious stones—responsibly sourced from leading mining regions across Brazil, Africa, Sri Lanka, and beyond. Our longstanding partnerships with miners and master cutters allow us to offer gemstones of exceptional beauty, provenance, and value. To better serve the global collector community, we established our dedicated online division exclusively for Catawiki. Here, we deliver the same uncompromising standards trusted by our wholesale clients for decades: certified gemstones, professional photography, transparent pricing, and complete authenticity. Every stone we offer reflects our unwavering commitment to excellence—because your confidence remains the foundation of our continued success.”

Details

Nr of stones
1
Lab report number
TH25G114901
Gemstone type
Opal
Total carat weight
11.92
Gemstone colour
White
Optical effect
Play of colour
Cut grade
Excellent
Transparency
Transparent
Clarity grade
Loupe clean
Treatment
Not specified in the report
Origin as given on certificate
No origin given
Laboratory Report
International Colored Gemstone Association (ICA GemLab)
Sealed by laboratory
No
Title additional information
**Celestial-Prism-Magic**
Shape
Oval
Cutting style
Cabochon cut
ThailandVerified
pro

Disclaimer

Catawiki always aims to offer you the best possible buying experience. Our experts virtually review and select every object in line with our submission guidelines. While we strive to provide a detailed description and photographs of each jewellery object, discrepancies or inaccuracies may occur. It is your responsibility to review all of the information provided about an object, including the condition and description, before placing an order. Sellers are responsible for the information, pictures and description provided, including the quality, quantity and nature of the jewelry supplied. A small imperfection that cannot be seen in the photo but is included in the description is not a non-conformity. A Lab Report is not a guarantee, valuation or appraisal regarding the articles described therein. A Lab Report contains only the characteristics of an article described after it has been graded, tested, examined, and analyzed using the techniques and equipment used at the time of the examination from that specific Lab. The results of any other examination performed on the article may differ depending when, how, by whom and with which grading standard the article is examined. In addition, any changes and improvements in techniques and equipment that may have occurred which may enable the examiner to detect, among other things, the use of processes for altering the characteristics of an article which use was previously undetectable, does not automatically mean the object does not conform to its description.

Catawiki always aims to offer you the best possible buying experience. Our experts virtually review and select every object in line with our submission guidelines. While we strive to provide a detailed description and photographs of each jewellery object, discrepancies or inaccuracies may occur. It is your responsibility to review all of the information provided about an object, including the condition and description, before placing an order. Sellers are responsible for the information, pictures and description provided, including the quality, quantity and nature of the jewelry supplied. A small imperfection that cannot be seen in the photo but is included in the description is not a non-conformity. A Lab Report is not a guarantee, valuation or appraisal regarding the articles described therein. A Lab Report contains only the characteristics of an article described after it has been graded, tested, examined, and analyzed using the techniques and equipment used at the time of the examination from that specific Lab. The results of any other examination performed on the article may differ depending when, how, by whom and with which grading standard the article is examined. In addition, any changes and improvements in techniques and equipment that may have occurred which may enable the examiner to detect, among other things, the use of processes for altering the characteristics of an article which use was previously undetectable, does not automatically mean the object does not conform to its description.

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