Sapphire and Diamond Cross Over Ring in Platinum and Gold, Circa 1910.
Ref: 13532
Sapphire and
diamond cross over ring in
platinum and gold, circa 1910. Old cut, Ceylon,
natural cushion shaped sapphire in a claw setting weight approximately 1.15
ct set diagonally opposite a round
old cut diamond, also claw set with an approximate weight of 0.60ct. Shoulders are
millegrain set with eight round old cut diamonds in total, approximately 0.20ct combined. All to a ridged
shank.
Price £3,800
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CUSHION
A square or rectangular stone with rounded corners and deep crown facets, found almost exclusively in antique jewellery.
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.
OLD CUT DIAMOND
Refers to a stone cut with a circular shape and large CULET. These stones were cut to maximise light return in low light conditions predominantly prior to 1910. Also called an Old European Cut.
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 It is lighter, harder and stronger than gold or silver which it superseded as a setting for diamonds making finer intricate settings possible.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.
Shank
The part of the ring that encircles the finger, not including the top piece or head.
NATURAL
Natural can refer to a gemstone or a pearl. A natural stone is called such because it has not been subjected to any treatments.
A natural pearl is one that has grown through a natural irritant getting into an oyster, as opposed to a cultured pearl which will have been seeded with a bead nucleus.
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.
