Three vintage silver brooches, includes a enamel set bug brooch with pseudo silver marks, a onyx set brooch marked 925 and a mid century cameo set 800 silver brooch, total weight of items 30 grams
- 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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