Gentlemen's vintage onyx & 9ct rose gold signet ring, marked 9ct, weight 7.23 grams, cushion cut size 0.55 in. x 0.55 in. *some wear, ring size T-U
- Onyx - Onyx is a form of agate, used from antiquity and popular again in the 1920s and 30s. European onyx is generally green, but can be many other colours, and can contain bands of black and/or white.
This multicoloured stone is widely used for table tops, lamp bases and in jewellery. Some types of onyx are also used for cameos of which the upper white layer is cut away to reveal the colour beneath.
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