Sapphire and Diamond Ring, France, Circa 1925

A sapphire and diamond ring, France, circa 1925, the domed…
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A sapphire and diamond ring, France, circa 1925, the domed circular plaque set with calibre-cut sapphires and early transition-cut diamonds, with further diamond detail to the shoulders, with maker's mark and French assay mark, estimated total diamond weight 0.26 carats, gross weight approximately 4.30 grams, mounted in platinum and 18ct gold, size N.

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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.
  • 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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