Sapphire and diamond cluster ring by Black, Starr & Frost, circa 1920.
Ref: 14343
Sapphire and
diamond cluster ring by
Black, Starr & Frost, circa 1920. Ornate pierced out cluster ring set to centre with an oval old cut sapphire weighing approximately 1.10
ct in a
millegrained rub-over setting. Sixteen round old cut diamonds set to mount and shoulders with an approximate combined weight of 0.50ct. The whole in
platinum, with a swagged and carved
gallery.
Price
£4,200
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Interest
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GALLERY
On a ring, the area below the setting, usually described as pierced, carved, swagged, scrolled, ornate etc.
MILLEGRAIN
A type of setting for stones in which tiny beads of the metal are raised to grip the girdle and so enhance the sparkling effect.
PLATINUM
Platinum is the hardest precious metal. It is lighter, harder and stronger than gold or silver which it superseded as a setting for diamonds making finer intricate settings possible. Platinum was first hallmarked in the UK in 1975.
SAPPHIRE
Part of the Corundum family. Sapphire comes from the Persian "Saffir", or the Greek "Sapphiros". Blue is the best-known colour but it can be found in all colours of the spectrum.
Diamond
Diamond is the hardest of all gemstones (and the hardest naturally occuring mineral on earth)with a score of 10 on the Mohs scale. The word comes from the Greek word 'Adamas' meaning invincible. The diamond has been a highly prized gemstone for the last three thousand years.
BLACK, STARR & FROST
1801 - Present
1801 The oldest jewellery house in America was founded as Marquand & Paulding in Savannah, Georgia. In 1810 Erastus Barton and Frederick Marquand opened ‘Marquand and Barton’ near New York’s Maiden Lane. The company changed partners and in 1851 ‘Marquand & Co’ were one of a handful of American retailers to show at the Crystal Palace Great Exhibition.
By 1860 the company had changed to Ball, Black and Company, it was one of the most celebrated Jewellers in New York and its client list included royalty and high society. In 1876, the firm changed its name from Black, Ball, and Co. to Black, Starr, and Frost, when Mr Black took on two new partners, Cortlandt Starr and Aaron Frost, and moved to 251 Fifth Avenue. For many decades, Black, Starr, and Frost have been considered one of the great American jewellers.
In 1876, it was invited to exhibit at the Centennial Exposition in Philadelphia along with renowned firms like Tiffany & Company.
In 1929 the company merged with Gorham & Co, becoming Black, Starr & Frost-Gorham Inc. In 1939 the firm was one of five American jewellers invited to exhibit at New York’s World’s Fair. They took with them large sculptural pieces indicative of the time.
While not known as innovators, ‘Black, Star, and Frost’ has produced exquisite jewellery in almost every era.
CTIn reference to gemstones, an abbreviation of carat, a unit of weight. One carat is equal to 0.20 grams.
In reference to gold, also an abbreviation of carat, a unit of purity or fineness of gold and gold alloy, expressed as a number out of 24 parts by weight, e.g. '24 carat' signifies pure gold, '18 carat' 18/24th gold in the alloy, et cetera.
Originally derived from the carob seed, called quirat in Arabic, a seed of naturally uniform weight.
