Bi-colour Sapphire - 2.13 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - No Heating - Bi-Color
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Selected by Alberto Fidalgo
Qualified goldsmith, gemmologist and diamond dealer with over fifteen years experience.
Retail Estimate € 1,300 - € 1,600
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Natural bi-colour sapphire, 2.13 carat, heart-cut, transparent with deep blue and intense green colours, no heating treatment, sealed with ALGT report 81038915.
AI-assisted summary
Description from the seller
No treatment - natural deep blue / intense green sapphire - 2.13 Ct. - heart cut
original ALGT Report and sealed
ALGT Report Number: 81038915
Antwerp, 14 November 2025
Species: Natural Corundum
Variety: Bi-Color Sapphire
Shape and Cut: Heart Cut
Weight: 2.13 Carat
Measurements: 8.59 x 7.07 x 4.54 mm
Color: Deep Blue / Intense Green
Transparent
Additional Grading Characteristics
Optical Effect: Bi-Color
Comments: No indications of heating.
Delivery: Registered shipping with insurance and tracking number.
Perfectly suited as an investment, collector's item, or for use in a jewellery setting.
Sealed and original ALGT Report No. 81038915
No treatment - natural deep blue / intense green sapphire - 2.13 Ct. - heart cut
original ALGT Report and sealed
ALGT Report Number: 81038915
Antwerp, 14 November 2025
Species: Natural Corundum
Variety: Bi-Color Sapphire
Shape and Cut: Heart Cut
Weight: 2.13 Carat
Measurements: 8.59 x 7.07 x 4.54 mm
Color: Deep Blue / Intense Green
Transparent
Additional Grading Characteristics
Optical Effect: Bi-Color
Comments: No indications of heating.
Delivery: Registered shipping with insurance and tracking number.
Perfectly suited as an investment, collector's item, or for use in a jewellery setting.
Sealed and original ALGT Report No. 81038915
Details
Lab report number
81038915
Gemstone type
Sapphire
Total carat weight
2.13
Gemstone colour
Bi-colour
Transparency
Transparent
Treatment
No heat treatment
Laboratory Report
Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed by laboratory
Yes
Title additional information
No Heating - Bi-Color
Shape
Heart
Cutting style
Step 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.
