Statement ring - 18 kt. White gold - 12.41ct. tw. Ruby - Diamond
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Current bid
€ 500
Reserve price not met
Expert
Selected by Lina Plokhova
Specialises in post-2000 pre-owned jewellery. GIA diamond and diamond grading graduate.
Estimate € 4,100 - € 5,000
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White 18k gold ring (750) weighing about 11.20 g, featuring a natural ruby of 9.41 ct in an oval mixed-cut, surrounded by 45 natural diamonds totalling 3.00 ct (G/H, VS) with lab reports including Gemmologico C.A.G. Valenza C525271; ring size 53 (EU), vintage condition with possible repairs.
AI-assisted summary
Description from the seller
White Gold Ring 18 KT with NATURAL SAPPHIRE (CORUNDUM) 9.41 CT – Diamonds 3.00 CT – Gemological Certificate
Description
Made in 18 KT white gold (750/1000), with an overall weight of approximately 11.20 grams.
Indicative period of realization: around the 2000s.
NATURAL SAPPHIRE – CORUNDUM
Weight: 9.41 carats
Cut: mixed oval step-cut
Dimensions: approximately 14.38 x 11.88 x 5.70 mm
Color: red
Clarity: transparent
In GEM TEST Rep. 142/11 (2011) the gem is indicated as: “Sapphire of Burmese origin (Myanmar)”
As reported in the technical documentation, the gem has undergone an enhancing treatment consisting of superficial repair with high PbO₂-containing silicate products (glass filled), already detected in 2011 and confirmed in the most recent gemological certificate.
DIAMONDS – Total about 3.00 Carats
The sapphire is enhanced by an impressive double halo of brilliant-cut diamonds:
25 diamonds of about 0.08 ct each (total about 2.00 ct)
20 diamonds of about 0.05 ct each (total about 1.00 ct)
Estimated quality (as per technical appraisal F&H 18.81 SA – Lugano):
Color: G/H
Clarity: VS
The diamonds are well present, luminous and very brilliant, creating a splendid corona of light around the sapphire.
Documentation Included
Gemmological certificate C.A.G. Valenza n. C525271 (October 2025)
GEM TEST Rep. 142/11 (2011)
Technical appraisal F&H 18.81 SA – Lugano (06.11.2025)
The F&H 18.81 SA appraisal states:
White gold 18 KT
Total weight 11.20 g
Estimated composition and quality of the diamonds
Ring size
Current size: 53.
Shipping
The ring will be shipped together with all original certificates
Shipping will be carried out via DHL Express, fully trackable.
Shipping only within Europe
The package will be:
Insured for the full sale amount (maximum allowed by the courier)
Carefully and professionally packed
The ring will be delivered in an elegant jewelry box (not original to the ring), as visible in the photographs, in a bluish-green velvet color.
The stone may appear more transparent when the ring is not worn, while once worn the sapphire appears slightly less transparent and the red color looks more intense.
For this reason some photos were taken with direct light and others with more natural light, in order to show the color of the stone under different lighting conditions.
White Gold Ring 18 KT with NATURAL SAPPHIRE (CORUNDUM) 9.41 CT – Diamonds 3.00 CT – Gemological Certificate
Description
Made in 18 KT white gold (750/1000), with an overall weight of approximately 11.20 grams.
Indicative period of realization: around the 2000s.
NATURAL SAPPHIRE – CORUNDUM
Weight: 9.41 carats
Cut: mixed oval step-cut
Dimensions: approximately 14.38 x 11.88 x 5.70 mm
Color: red
Clarity: transparent
In GEM TEST Rep. 142/11 (2011) the gem is indicated as: “Sapphire of Burmese origin (Myanmar)”
As reported in the technical documentation, the gem has undergone an enhancing treatment consisting of superficial repair with high PbO₂-containing silicate products (glass filled), already detected in 2011 and confirmed in the most recent gemological certificate.
DIAMONDS – Total about 3.00 Carats
The sapphire is enhanced by an impressive double halo of brilliant-cut diamonds:
25 diamonds of about 0.08 ct each (total about 2.00 ct)
20 diamonds of about 0.05 ct each (total about 1.00 ct)
Estimated quality (as per technical appraisal F&H 18.81 SA – Lugano):
Color: G/H
Clarity: VS
The diamonds are well present, luminous and very brilliant, creating a splendid corona of light around the sapphire.
Documentation Included
Gemmological certificate C.A.G. Valenza n. C525271 (October 2025)
GEM TEST Rep. 142/11 (2011)
Technical appraisal F&H 18.81 SA – Lugano (06.11.2025)
The F&H 18.81 SA appraisal states:
White gold 18 KT
Total weight 11.20 g
Estimated composition and quality of the diamonds
Ring size
Current size: 53.
Shipping
The ring will be shipped together with all original certificates
Shipping will be carried out via DHL Express, fully trackable.
Shipping only within Europe
The package will be:
Insured for the full sale amount (maximum allowed by the courier)
Carefully and professionally packed
The ring will be delivered in an elegant jewelry box (not original to the ring), as visible in the photographs, in a bluish-green velvet color.
The stone may appear more transparent when the ring is not worn, while once worn the sapphire appears slightly less transparent and the red color looks more intense.
For this reason some photos were taken with direct light and others with more natural light, in order to show the color of the stone under different lighting conditions.
Details
Free resizing offered
Yes
Total carat weight of all stones
12.41
No. of main gemstones
46
Lab report number
C525271
Diamond colour grade of surrounding stones
G
Diamond type of surrounding stones
Natural
Laboratory report
Centro Analisi Gemmologiche (Pio Visconti)
Era
After 2000
Cutting style of surrounding stones
Brilliant cut
Fineness
18 kt.
Brand jewellery
No
Total carat weight of main stone(s)
9.41
Metal
White gold
Number of diamonds surrounding stones
45
Colour of main stone
Red
Main stone
Ruby
Total carat weight of surrounding stones
3.00
Total weight
11.2 g
Diamond clarity grade of surrounding stones
VS1
Cut grade of main stone
Very good
Surrounding stones
Diamond
Condition
Vintage - used with signs of possible repair
Transparency of main stone
Transparent
Clarity grade of main stone
Slight
Country of origin
Italy
Gender
Women
Treatment of main stone
Waxing
Shape of main stone
Oval
Cutting style of main stone
Faceted cut
Country of origin of main stone (if certified)
Myan Mar
Ring size
53 (EU) / 13 (IT) / 6 ¼ (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.
