18ct gold, ruby, onyx, diamond and enamel brooch, Frascarolo, circa 1960, modelled as a basset hound dog, the face pave-set at intervals with circular-cut diamonds, the eyes accented by collet-set oval rubies, the nose decorated with onyx, the ears and body applied with reddish brown enamel between gold wire dividers, approximately 1.57 in. x 1.57 in., signed FC for Frascarolo.
- 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.
- Circa - A Latin term meaning 'about', often used in the antique trade to give an approximate date for the piece, usually considered to be five years on either side of the circa year. Thus, circa 1900 means the piece was made about 1900, probably between 1895 and 1905. The expression is sometimes abbreviated to c.1900.
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