Blue Sapphire - 20.16 ct - Gem research Swiss Lab (GRS) - Indigo - Unheated
00
days
17
hours
44
minutes
28
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Current bid
€ 16,000
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 € 155,000 - € 210,000
 | €16,000 | |
|---|---|---|
 | €15,500 | |
 | €15,000 | |
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Natural sapphire from Sri Lanka, Indigo blue, 20.16 carats, cushion cut with modified brilliant, eye-clean transparency, no evidence of treatments, GRS laboratory report no. 2025-057821.
AI-assisted summary
Description from the seller
Natural Sri Lankan Sapphires/Corundum
Origin: Sri Lanka
Variety: Blue Indigo Sapphire
Identified and certified in Switzerland,
at the GRS Laboratory
Full certificate of analysis no. 2025-057821 [see photos]
Purity/clarity/color: Pure to the eye, one of the most attractive blues
Cushion-cut brilliant with a near-perfect polish
Weight: 20.16 carats (Collector*: weight/dimensions/not-treated/size precise with symmetrical facet proportions)
Dimensions: 15.55 x 12.3 x 10.41 mm
Easily regarded as an investment or titled as “Collector-Grade”
This Sapphire comes from fair trade across the entire import chain
(minimal, due to the few intermediaries and the knowledge of miners and local cutter)
It completes everything a Sapphire can offer in terms of possibilities, of course, with multiple projects in sight or simply as an investment (personal or professional). It will surely be a part of a very beautiful story as its journey continues..
No indications of heat treatment detected.
Shipping:
International:
- DHL Express/UPS Express, professional, fully trusted and safe (traceable) 24/48h
Domestic:
- Bpost by insured 24h pro (traceable) insurance included
****Customs & Taxes:
- Your country of residence may impose additional duties and import taxes. Additional VAT calculations are based on your country’s tax system.
We cannot be held responsible for extra charges incurred for importing items into the purchaser’s country of residence.
*Please note that the buyer is always responsible for duties on international shipments.
If you wish to know the detailed amount, please contact your local tax office.
****
-Important: For deliveries to France, a customs broker is required to handle the clearance process.
This may incur additional charges, which are also the buyer’s responsibility. If you wish to know the exact amount, please contact the customs or tax office in your region.
****
Seller's Story
Combining foundational expertise acquired from premier Belgian gemological institutions with an international sourcing network, the enterprise delivers fine natural gemstones to a global clientele of collectors and investors. Driven by an unyielding commitment to gemological culture and scientific transparency, the curated auction portfolio showcases verified rarities selected for superior cut, optical clarity, and geological significance. Supported by years of commercial expansion and formal industry validation, the firm bridges technical verification with accessible luxury, providing complete operational transparency, certified authenticity, and an elevated buying experience across every transaction.
Natural Sri Lankan Sapphires/Corundum
Origin: Sri Lanka
Variety: Blue Indigo Sapphire
Identified and certified in Switzerland,
at the GRS Laboratory
Full certificate of analysis no. 2025-057821 [see photos]
Purity/clarity/color: Pure to the eye, one of the most attractive blues
Cushion-cut brilliant with a near-perfect polish
Weight: 20.16 carats (Collector*: weight/dimensions/not-treated/size precise with symmetrical facet proportions)
Dimensions: 15.55 x 12.3 x 10.41 mm
Easily regarded as an investment or titled as “Collector-Grade”
This Sapphire comes from fair trade across the entire import chain
(minimal, due to the few intermediaries and the knowledge of miners and local cutter)
It completes everything a Sapphire can offer in terms of possibilities, of course, with multiple projects in sight or simply as an investment (personal or professional). It will surely be a part of a very beautiful story as its journey continues..
No indications of heat treatment detected.
Shipping:
International:
- DHL Express/UPS Express, professional, fully trusted and safe (traceable) 24/48h
Domestic:
- Bpost by insured 24h pro (traceable) insurance included
****Customs & Taxes:
- Your country of residence may impose additional duties and import taxes. Additional VAT calculations are based on your country’s tax system.
We cannot be held responsible for extra charges incurred for importing items into the purchaser’s country of residence.
*Please note that the buyer is always responsible for duties on international shipments.
If you wish to know the detailed amount, please contact your local tax office.
****
-Important: For deliveries to France, a customs broker is required to handle the clearance process.
This may incur additional charges, which are also the buyer’s responsibility. If you wish to know the exact amount, please contact the customs or tax office in your region.
****
Seller's Story
Combining foundational expertise acquired from premier Belgian gemological institutions with an international sourcing network, the enterprise delivers fine natural gemstones to a global clientele of collectors and investors. Driven by an unyielding commitment to gemological culture and scientific transparency, the curated auction portfolio showcases verified rarities selected for superior cut, optical clarity, and geological significance. Supported by years of commercial expansion and formal industry validation, the firm bridges technical verification with accessible luxury, providing complete operational transparency, certified authenticity, and an elevated buying experience across every transaction.
Details
Lab report number
2025-057821
Gemstone type
Sapphire
Total carat weight
20.16
Gemstone colour
Blue
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
Indigo - Unheated
Shape
Cushion
Cutting style
Modified brilliant cut
Sold by
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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.
