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Thursday 25 November 2010 | 10:00 | Lots: 435

A natural black opal and diamond cluster ring,

Lot 368

A natural black opal and diamond cluster ring, the central oval opal cabochon surrounded by...

Thursday 25 November 2010 | 10:00 | Lots: 435

Lot 368

Lot 368

A natural black opal and diamond cluster ring, the central oval opal cabochon surrounded by...

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Lot 368

Lot Description

A natural black opal and diamond cluster ring, the central oval opal cabochon surrounded by sixteen round brilliant cut diamonds. Estimated total diamond weight 1.88cts, colour- G- H/I, clarity VS. Opal measures 15.31 x 11.58 x 4.35mm. Accompanied by a report from GRS, stating the stone is a natural black opal, with the country of origin being Australia. Report no. GRS2008 - 080438T, dated 4th September 2008. Stamped 18K



Postage: Auction Default

Weight: No

Total lot weight: No

The ring is in good condition. A strong full play-of-colour can be seen throughout the opal, to include orange, red, yellow, green, blue, mauve and pink. . This has a large segmented distribution. The diamonds are bright, lively and well matched. There is one minor scratch to the shank. Ring size UK- O US- 7 1/2.


GRS Gem Research Swiss LAB Report:


No. GRS2008-080438T

Date: 4th September 2008

Object: One partially polished gemstone

Identification: Natural Black Opal

Weight- 4.15ct

Dimensions: 15.31 x 11.58 x 4.35mm

Cut: cabochon/partially polished

Shape: Oval

Colour: play of colour and grey matrix

Comment: No indication of treatments


Origin: Gemmological testing revealed characteristics corresponding to those of a natural black opal from Australia.  

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