Blue, Violet, Purple, Pink Sapphire - 5.24 ct - Gem research Swiss Lab (GRS) - No Heat, Sri Lanka
02
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Current bid
€ 2,650
Reserve price not met
Expert
Selected by Purificacion Aquino Garcia
Holds a gemmology degree from IGE Madrid and an MBA from University of Santiago de Compostela.
Retail Estimate € 17,000 - € 21,000
 | €2,650 | |
|---|---|---|
| €2,450 | |
| €2,250 | |
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Natural color-change sapphire, 5.24 ct, Sri Lanka origin, no heat treatment, certified by GRS GemResearch Swisslab (GRS2026-097522).
AI-assisted summary
Description from the seller
Royal Antwerp Gem – Natural Color-Change Sapphire – 5.24 ct – Sri Lanka – No Heat – GRS Swiss Lab Certified
⸻
DESCRIPTION
An exceptional Natural Color-Change Sapphire weighing 5.24 ct, displaying a remarkable change of color under different lighting conditions.
According to the GRS report, the gemstone changes from violetish-blue in daylight to purple-pink under incandescent light, creating two distinctly different appearances in a single natural sapphire.
The gemstone features a cushion shape with a modified brilliant/step cut.
It has been examined and certified by GRS GemResearch Swisslab, Switzerland, which determined its geographic origin as Sri Lanka (Ceylon).
Importantly, the report states “No indication of thermal treatment”, confirming its unheated status.
The combination of 5+ carat size, natural color-change phenomenon, Sri Lankan origin, no-heat status and GRS certification makes this a particularly interesting gemstone for a serious collection or an important bespoke jewelry piece.
⸻
SPECIFICATIONS
Gemstone: Natural Color-Change Sapphire
Weight: 5.24 ct
Color: Violetish-Blue (Daylight) → Purple-Pink (Incandescent Light)
Phenomenon: Natural Color Change
Shape: Cushion
Cut: Modified Brilliant/Step (3)
Dimensions: 11.60 × 7.71 × 6.35 mm
Origin: Sri Lanka (Ceylon)
Treatment: No indication of thermal treatment
Laboratory: GRS GemResearch Swisslab, Switzerland
Report No.: GRS2026-097522
Report Date: 17 September 2026
⸻
SHIPPING
The gemstone will be shipped securely, fully insured and with international tracking.
Professional handling and careful packing are provided to ensure safe delivery.
⸻
PACKAGING
The gemstone will be carefully packed in a protective gemstone box/bag together with its original GRS GemResearch Swisslab report.
⸻
DEALER NOTE
PARAIBA – Fine Gemstones
We specialize in carefully selected natural colored gemstones, with a focus on quality, transparency and professional gemological certification.
Our gemstones are individually selected and, where appropriate, submitted to internationally recognized gemological laboratories for independent examination.
⸻
NOTES
The color-change effect depends strongly on the type and temperature of the light source. The gemstone should therefore be viewed under both daylight/daylight-equivalent and incandescent lighting to appreciate its different colors.
Photographs are taken to represent both appearances as accurately as possible. Actual colors may vary slightly depending on lighting conditions, camera settings and screen calibration.
Please refer to the GRS report for the independent gemological identification, color description, treatment information and origin determination.
Seller's Story
Paraiba is a Belgium-based gemstone dealer with a passion for exceptional natural gemstones and mineral treasures from around the world.
For many years, we have personally sourced and selected gemstones through trusted networks of miners, cutters, collectors, and dealers across Asia, Africa, South America, and Europe. Every stone is chosen individually based on its beauty, character, rarity, and overall value.
We work exclusively with respected gemological laboratories and independent experts, including renowned institutions in Antwerp, one of the world’s most important centers for the gemstone and diamond trade. Whenever possible, gemstones are accompanied by professional certification to provide buyers with additional confidence and transparency.
Our philosophy is simple: we sell only gemstones that we would proudly add to our own collection. We believe that every gemstone has a story, and we take great care in presenting each piece honestly and accurately.
Today, with more than 500 successful sales and a 100% customer satisfaction score, we continue our search for remarkable gemstones across the globe, bringing unique finds directly to collectors, investors, jewelers, and gemstone enthusiasts.
Thank you for visiting Paraiba and sharing our passion for natural treasures.
Royal Antwerp Gem – Natural Color-Change Sapphire – 5.24 ct – Sri Lanka – No Heat – GRS Swiss Lab Certified
⸻
DESCRIPTION
An exceptional Natural Color-Change Sapphire weighing 5.24 ct, displaying a remarkable change of color under different lighting conditions.
According to the GRS report, the gemstone changes from violetish-blue in daylight to purple-pink under incandescent light, creating two distinctly different appearances in a single natural sapphire.
The gemstone features a cushion shape with a modified brilliant/step cut.
It has been examined and certified by GRS GemResearch Swisslab, Switzerland, which determined its geographic origin as Sri Lanka (Ceylon).
Importantly, the report states “No indication of thermal treatment”, confirming its unheated status.
The combination of 5+ carat size, natural color-change phenomenon, Sri Lankan origin, no-heat status and GRS certification makes this a particularly interesting gemstone for a serious collection or an important bespoke jewelry piece.
⸻
SPECIFICATIONS
Gemstone: Natural Color-Change Sapphire
Weight: 5.24 ct
Color: Violetish-Blue (Daylight) → Purple-Pink (Incandescent Light)
Phenomenon: Natural Color Change
Shape: Cushion
Cut: Modified Brilliant/Step (3)
Dimensions: 11.60 × 7.71 × 6.35 mm
Origin: Sri Lanka (Ceylon)
Treatment: No indication of thermal treatment
Laboratory: GRS GemResearch Swisslab, Switzerland
Report No.: GRS2026-097522
Report Date: 17 September 2026
⸻
SHIPPING
The gemstone will be shipped securely, fully insured and with international tracking.
Professional handling and careful packing are provided to ensure safe delivery.
⸻
PACKAGING
The gemstone will be carefully packed in a protective gemstone box/bag together with its original GRS GemResearch Swisslab report.
⸻
DEALER NOTE
PARAIBA – Fine Gemstones
We specialize in carefully selected natural colored gemstones, with a focus on quality, transparency and professional gemological certification.
Our gemstones are individually selected and, where appropriate, submitted to internationally recognized gemological laboratories for independent examination.
⸻
NOTES
The color-change effect depends strongly on the type and temperature of the light source. The gemstone should therefore be viewed under both daylight/daylight-equivalent and incandescent lighting to appreciate its different colors.
Photographs are taken to represent both appearances as accurately as possible. Actual colors may vary slightly depending on lighting conditions, camera settings and screen calibration.
Please refer to the GRS report for the independent gemological identification, color description, treatment information and origin determination.
Seller's Story
Paraiba is a Belgium-based gemstone dealer with a passion for exceptional natural gemstones and mineral treasures from around the world.
For many years, we have personally sourced and selected gemstones through trusted networks of miners, cutters, collectors, and dealers across Asia, Africa, South America, and Europe. Every stone is chosen individually based on its beauty, character, rarity, and overall value.
We work exclusively with respected gemological laboratories and independent experts, including renowned institutions in Antwerp, one of the world’s most important centers for the gemstone and diamond trade. Whenever possible, gemstones are accompanied by professional certification to provide buyers with additional confidence and transparency.
Our philosophy is simple: we sell only gemstones that we would proudly add to our own collection. We believe that every gemstone has a story, and we take great care in presenting each piece honestly and accurately.
Today, with more than 500 successful sales and a 100% customer satisfaction score, we continue our search for remarkable gemstones across the globe, bringing unique finds directly to collectors, investors, jewelers, and gemstone enthusiasts.
Thank you for visiting Paraiba and sharing our passion for natural treasures.
Details
Lab report number
GRS2026-097522
Gemstone type
Sapphire
Total carat weight
5.24
Gemstone colour
Blue, Pink, Purple, Violet
Optical effect
Colour change
Transparency
Transparent
Clarity grade
Eye clean
Treatment
No evidence of treatment
Origin as given on certificate
Sri Lanka
Laboratory report
Gem research Swiss Lab (GRS)
Sealed by laboratory
No
Title additional information
No Heat, Sri Lanka
Shape
Cushion
Cutting style
Brilliant cut
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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.
