Cocktail ring Platinum - 13.30ct. tw. Sapphire - Diamond
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Platinum ring featuring a blue cushion-cut sapphire of 13 ct with transparent stones and natural round diamonds totaling 3 ct (I–J, VS1–VS2), Art Nouveau style, CISGEM lab report no. 32823, total weight 9.04 g, EU size 54, origin Sri Lanka, no heat treatment, circa 1950s, in good condition.
AI-assisted summary
Description from the seller
1950s platinum ring with a large central sapphire and diamonds
Total weight 9.04 g
Sapphire 13 ct
Natural corundum
Blue
Transparent
Cushion-cut, mixed
11.45 x 15.50 x 7.60 mm
No heating indicated
Origin Sri Lanka (Ceylon)
Cisgem report no. 32823 (Milan, 7 April 2026)
Diamonds 3 ct total
I-J
VS1-VS2
Round, brilliant
The metal has been lab-tested.
Registered shipping
1950s platinum ring with a large central sapphire and diamonds
Total weight 9.04 g
Sapphire 13 ct
Natural corundum
Blue
Transparent
Cushion-cut, mixed
11.45 x 15.50 x 7.60 mm
No heating indicated
Origin Sri Lanka (Ceylon)
Cisgem report no. 32823 (Milan, 7 April 2026)
Diamonds 3 ct total
I-J
VS1-VS2
Round, brilliant
The metal has been lab-tested.
Registered shipping
Details
Shape of surrounding stones
Round
Free resizing offered
No
Total carat weight of all stones
13.30
Style
Art Nouveau
No. of main gemstones
1
Lab report number
32823
Diamond colour grade of surrounding stones
I
Diamond type of surrounding stones
Natural
Era
1900-2000
Laboratory report
CISGEM (Centro informazioni e servizi gemmologici)
Cutting style of surrounding stones
Brilliant cut
Total carat weight of main stone(s)
13.00
Metal
Platinum
Brand jewellery
No
Total carat weight of surrounding stones
3.00
Main stone
Sapphire
Colour of main stone
Blue
Diamond clarity grade of surrounding stones
VS1
Surrounding stones
Diamond
Total weight
9.04 g
Cut grade of main stone
Fair
Condition
Good condition - used with some signs of wear
Transparency of main stone
Transparent
Gender
Women
Clarity grade of main stone
Slight
Treatment of main stone
No evidence of treatment
Shape of main stone
Cushion
Cutting style of main stone
Mixed cut
Country of origin of main stone (if certified)
Asia
Ring size
54 (EU) / 14 (IT) / 6 ¾ (US)
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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.
