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Glossary K : 1 - 50

Kunzite

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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 -...

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Klein, Anne

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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.

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King Cut

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The king cut is a modification of the brilliant cut which is used for large diamonds.  This cut has 86 facets.

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Keeper Ring

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A keeper ring is a ring which is used alongside another, more valuable ring to keep it securely on the finger.

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Karatclad

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Karatclad is a trademark for a very thick gold electroplating process; this type of plating is about 14 times thicker than standard electroplating.

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Keystone

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A keystone is a stone cut the shape of a keystone in an arch.  Keystones are usually step cut.

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Knot

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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.

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Kyanite

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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.

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Knuckle-to-Finger-Differential

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The Knuckle-to-Finger-Differential is the difference in size between the knuckle and the part of the finger where your ring rests is what I call the knuckle- to-finger-differential. Persons with large differentials are good candidates for rings that hinge open on the bottom so they can be slipped more easily over the knuckle.

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Knock-off

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A Knock-off is an imitation of another piece of jewelry, often a copy of a piece from a well known designer. Knock-offs are usually less expensive than the original. Quality varies widely, but knock-offs regularly lack the weight and fine details of the real thing.

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Karat

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Karat is a measure of the percentage of pure gold in a piece of jewelry. 24 karat (24k) gold is 100% gold. 14k gold is made up of 58% gold and 42% other metals (14 parts gold, to 10 parts other metals). Similarly, 18k gold is made up of 75% gold and 25% other metal (18 parts gold, to 6 parts other metals). Note: Carat—with a “C”—is a measure of gemstone weight.

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