An agate, diamond, enamel and jasperware panel vesta case, Boucheron, early 20th century the transluscent carved agate case of rounded rectangular outline, the hinged cover with blue and white strapwork banding to a millegrain-set rose-cut diamond decorated clasp, the white enamel hinges with rose diamond accents, enhanced by a central blue and white jasperware panel depicting a classical floral motif within a rose diamond-set frame, with engraved striking panel to the base, approximately 49 x 32 mm, signed Boucheron Paris, with French assay marks. Property from the Collection of Dame Nellie Melba GBE
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- Assay / Assayed - Assaying is the testing of a metal, most commonly silver and gold to determine its ingredients and quality. In Britain, once an item of silver or gold has been assayed, a mark is stamped on it, certifying its purity. Known as hallmark, it derives its name from the Guild Hall of the Goldsmiths' Company, who recieved its Charter in 1327 giving it the power to assay and mark articles of gold and silver.
- Agate - Agate is a type of semi-precious gemstone that is made up of silica dioxide, a mineral that is also found in quartz. It is known for its distinctive banded patterns, which are created as layers of silica are deposited in different colours including red, orange, yellow, green, blue, and purple. It is often used in jewellery, decorative objects, and other decorative items, and it is prized for its beauty and durability. Agate is found in many parts of the world, including Brazil, India, and the United States.
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