M. Gerard, emerald and diamond bracelet by Andre Vassort, designed as a brilliant-cut diamond set knot suspending four rows of polished round emerald beads, signed M. Gerard, Andre Vassort maker's mark, numbered, French assay mark, estimated total diamond weight 7.60 carats, 18ct gold, weight 35gm, length 19.5gm. André Vassort established his workshop, atelier Vassort, in 1955. He became renowned for his fine workmanship and was sought after by elite French jewellery houses van Cleef & Arpels, Boucheron and Mauboussin. Louis Gérard left van Cleef & Arpels to establish M. Gérard in 1968. Together, they went on to create exquisite jewels for the more than 20 years.
- Atelier - Atelier (French for "workshop"), in English usuage describes the workshop of an artist in the fine or decorative arts, where the artist and a number of assistants, students and apprentices worked together producing pieces that went out in the artists name. This was the standard practice for European artists from the Middle Ages to the 18th or 19th century
- Emeralds - Emeralds have been used in jewellery making for thousands of years, and are prized for their deep green colour, which is caused by the presence of chromium and vanadium in the mineral beryl. Because of their rare colour, emeralds are often more valuable than diamonds of a similar size and quality. In jewellery making, emeralds are typically cut into round or oval shapes to maximize their color and clarity. They are often set in gold or platinum and used as the centrepiece of a piece of jewellery, such as a ring or necklace. They can also be used in combination with other gems, such as diamonds, to create intricate and beautiful designs.
- 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.
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