1 pcs Blue Sapphire - 1.02 ct - Antwerp Laboratory for Gemstone Testing (ALGT)
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days
10
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32
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Current bid
€ 125
Reserve price met
Expert
Selected by Francesca Floramo
Graduate gemmologist from GIA with 20 years jewellery experience, specialising in brand jewellery.
Retail Estimate € 330 - € 400
 | €125 | |
|---|---|---|
| €69 | |
| €63 |
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Sapphire, 1 stone, 1.02 ct, blue, oval cabochon, ALGT lab report 41165412, untreated and sealed by the lab, transparent.
AI-assisted summary
Description from the seller
No treatment (unheated stone) - Lab report: 41165412
Number of stones: 1
Laboratory report number: 41165412
Gemstone type: Sapphire
Total weight in carats: 1.02
Color: Blue
Clarity of gemstones: Transparent
Treatment: No evidence of treatment
Certification: Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed: Yes
Additional information title: No Heat
Shape: Oval
Cut type: Mixed-cut
Colored gemstone identification report No. 41165412
(June 18, 2026)
Natural corundum
Sapphire
Oval shape, mixed-cut
1.02 ct
6.11 x 5.10 x 3.38
Deep blue (tending toward teal-blue depending on light)
Transparent
No heating indicated
No treatment (unheated stone) - Lab report: 41165412
Number of stones: 1
Laboratory report number: 41165412
Gemstone type: Sapphire
Total weight in carats: 1.02
Color: Blue
Clarity of gemstones: Transparent
Treatment: No evidence of treatment
Certification: Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed: Yes
Additional information title: No Heat
Shape: Oval
Cut type: Mixed-cut
Colored gemstone identification report No. 41165412
(June 18, 2026)
Natural corundum
Sapphire
Oval shape, mixed-cut
1.02 ct
6.11 x 5.10 x 3.38
Deep blue (tending toward teal-blue depending on light)
Transparent
No heating indicated
Details
Number of stones
1
Lab report number
41165412
Gemstone type
Sapphire
Total carat weight
1.02
Gemstone colour
Blue
Optical effect
Colour change
Transparency
Transparent
Clarity grade
Slight
Treatment
No evidence of treatment
Laboratory report
Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed by laboratory
Yes
Shape
Oval
Cutting style
Cabochon 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.
