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Illustrated Dictionary of Jewelry
Karat (abbreviated Kt) is a measure of the fineness of gold. 24 karat gold is pure gold. 18 karat gold is 18/24 gold (about 75% gold - three quarters gold). 14 karat gold is 14/24 gold (about 58% gold - a little over half gold). 12 karat gold is exactly half gold. 10 karat gold is 10/24 gold (only about 43.5% gold - less than half gold).
Karatclad is a trademark for a very thick gold electroplating process; this type of plating is about 14 times thicker than standard electroplating.
A costume jewelry company formed in 1940, Kaufman (the comedian Andy Kaufman's parents) and Ruderman, Inc, New York, NY. The Karu pin above is paste (glass stones) and enamel on gold-plated metal.
A keeper ring is a ring which is used alongside another, more valuable ring to keep it securely on the finger.
A keystone is a stone cut the shape of a keystone in an arch. Keystones are usually step cut. The costume jewelry manufacturer Schreiner uses keystones in many of its pieces.
The king cut is a modification of the brilliant cut which is used for large diamonds. This cut has 86 facets.
Anne Klein (1923-1974) was an influential and popular American fashion designer. Anne Klein jewelry and buttons have been manufactured by the Swank Inc. since 1981. Anne Klein's logo is a lion's head on a square tag.
A knot is a flaw (a mineral inclusion) in a gemstone (usually a diamond) that is ar the surface of a gem after polishing. The know is a small raised bump on the finished gemstone.
The Koh-i-Nur (meaning "Mountain of Light") is one of the largest-known diamonds. It was found in India and belonged to the first Indian Rajahs of Malwa (in the 1300s). The gem made its way to Persia in the 1500s (taken as a spoil of war by the Mogul Sultan Babur). At some point it was returned to Indiabut was taken by the East India Company and presented to Queen Victoria of England in 1850. Tge gem was later cut and set into a brooch and later into the State Crown of the United Kingdom. The Koh-i-Nur is part of the crown jewels of England and is kept in the Tower of London, London, England.
Kramer was a high-quality costume jewelry company founded by Louis Kramer in 1943. He was then joined by his brothers Harry and Morris. Some of their pieces are marked 'Kramer,' others are marked, 'Kramer of New York.' Kramer made jewelry for the Dior company during the 1950's. Kramer went out of business in the 1970's. The fish pin above is by Kramer.
Kunzite is a transparent pink, light pink, or light purple gemstone that resembles roze quartz. It is a variety of the mineral spodumene. Kunzite can fade after prolonged exposure to light. Kunzite is also called "evening stone," because of its propensity to fade in bright light. The original color of some kunzite stones can be restored or even intensified by irradiation. It is usually used as a large stone and is easily chipped; small stones of kunzite are difficult to cut. Kunzite is often used in pendants. Kunzite has a hardness of 6-7 and a specific gravity of 3.1 - 3.2. Kunzite was first found in 1902 in Pala, California, USA, and is named for the gemologist George F. Kunz. Kunzite's chemical composition is LiAlSi2O6
Kyanite is a deep sapphire blue, green, gray, or white gemstone. The color is not always uniform; it can be blotchy or in streaks. The cystals are crystals are transparent to translucent. Kyanite has a hardness of 4.5 to 6.5; the hardness varies depending on which way it is scratched (this happens because kyanite consists of long, thin crystals). It has a specific gravity of 3.58. Kyanite is found in Brazil, Burma, Kenya, Europe, India, Australia, Kenya, and the USA. Kyanite's chemical composition is Al2SiO5; it is composed of andalusite and sillimanite.
Illustrated Dictionary of Jewelry
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