Antique Emerald and Diamond Cross/Over Ring.
Ref: 13433
Antique emerald and
diamond cross/over ring.
Cushion shaped old cut Columbian emerald in an eight claw setting with an approximate weight of 0.50
ct. Opposite side is claw set with a round
old cut diamond with an approximate weight of 0.55ct. Each shoulder is set with four cushion shaped old cut diamonds in grain settings with an approximate total weight of 0.24ct. Mounted and set in
platinum and yellow gold, circa 1905.
Price £4,400
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Interest
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ANTIQUE
Any item judged to have been made at least 100 years ago.
CUSHION
A square or rectangular stone with rounded corners and deep crown facets, found almost exclusively in antique jewellery.
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 It is lighter, harder and stronger than gold or silver which it superseded as a setting for diamonds making finer intricate settings possible.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.
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.
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.
EMERALD
Emeralds are a variety of the beryl family, coloured green by trace amounts of chromium and sometimes vanadium. Beryl scores 7.5-8 on the Mohs scale of hardness. Most emeralds are highly included, so more care is recommended when wearing them. The word "emerald" comes from the Greek 'smaragdos' meaning green stone.
