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A silvery white metal used in alloys and electroplating.
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Small squares of solder.
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The separating plane of a twinned crystal.
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Surface appearance of naturally or artificially aged metal, especially copper, brass, or silver.
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A method of setting multiple stones in jewelry so little or no metal shows around the stones.
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The portion of a faceted stone below the girdle.
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A gem cut with a rounded top and narrowing down to a point.
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A durable cement used for pegging pearls.
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A picture or pattern composed of small rounded stones which are cemented onto a base and then grouted.
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Magmatites with large, individual crystals; a source of many gem minerals.
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A plasticized cloth used for the surfaces of polishing laps.
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Precious metals such as gold wire are sold by the pennyweight, 24 grains troy.
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An alloy composed of tin, antimony, and copper.
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A resin polishing lap used especially for hard stones.
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Gem materials which have an unusual optical quality such as chatoyance, labradorescence, asterism, etc.
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An acid bath for metal to dissolve surface oxidation and flux residue. Works more rapidly when heated in the pickle pot.
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Making a design by cutting through the metal.
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Characteristic of some crystals that become electrically charged when mechanically altered.
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A black semi-hard substance, which softens when heated, used in bowls to hold metal in place while it is being worked in such process as chasing or engraving.
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A scored lap made of opticians pitch, used for polishing large surfaces.
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Hammering metal on a metal stake with a special hammer to remove irregularities.
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Used as a filler and carrier in tumblers.
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Sulfate- or chloride-based solutions used for electroplating.
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Hard, white, long-wearing precious metal.
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The spectral colors which are seen in an opal as it is moved in changing light.
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The quality of a gem to exhibit different colors when viewed from several directions.
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Pliers necessary for silversmiths are round nose, needle nose, flat nose, and cutting nose.
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Enamel work on lacy metal frame such as filigree, which has no backing in part and this is transparent or translucent.
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A small, air-driven, reciprocating impact tool used in the preparation of fossils.
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The smooth, glassy reflecting surface of a finished stone.
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The finely ground powders mixed with water for a polish slurry. (Sometimes formed as bars.) Examples include tin oxide, cerium oxide, and chrome oxide.
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A stone which is shaped to the approximate size and form desired but has not been fully ground and has not been sanded or polished.
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A satiny appearance which begins when the fine sanding is satisfactory.
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A portable acetylene torch for jewelry work.
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Metal projection for holding stones in settings.
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A tool with a blunt end for pushing prongs over stones.
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Portable pinpoint torch which burns propane.
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Very thin blades for cutting high-quality gem material.
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A grooved wheel attached to a motor shaft and machine shaft which transfers power from motor to machine by means of rubber belts.
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A fine powder for polishing or cleaning.
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Used with dapping blocks to shape metals.
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A characteristic of some minerals that become electrically charged when heated or cooled.
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Device for measuring temperature in burnout ovens.
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Monday, September 2, 2013
Jewelry Glossary - P
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