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Terms for subject Jewelry (567 entries)

oxidation	A chemical reaction between different types of metals and the air. Tarnish is the result of the oxidation process with sterling silver and pure silver.
P. Fucata	Oyster used to produce Japanese and Chinese cultured pearls.
P. Margaritifera	A pearl-producing oyster with black, white, or golden colored "lips. The black variety of this mollusk is used to create Tahitian black pearls.
P. Martensii	A pearl-producing oyster used in Japan and China, smaller than Maxima and capable of producing pearls up to a maximum of about 10+ mm.
P. maxima	A large oyster used to produce South Sea cultured pearls.
parcel of gemstones	A way to purchase gemstones either mixed or of one type, that are sold according to their carat weight. Buying by the parcel is a popular way for artisans who use multiple gemstones in cluster jewelry.
partial bezel setting	Also called a split bezel or partial bezel, this type of setting is often used with a varied setting. The bezel portion only cradles on side of the gem and the other is held in place by another variety of setting, usually a prong type setting.
paste	Glass made to imitate gems.
pave	A type of setting in which the stones are effectively "paved" into the piece of jewelry with a precious metal. Often small gemstones or pieces of jewelry with curve surfaces use this technique to set stones.
pavilion	A lower surface of a brilliant-cut gem slanting outward from the culet to the girdle.
pearl	A smooth, rounded bead formed within the shells of certain mollusks and composed of the mineral aragonite or calcite in a matrix, deposited in concentric layers as a protective coating around an irritating foreign object
pebble ring	A ring that features a polished pebble or multiple pebbles. These rings are a popular Bohemian style.
peek-a-boo stones	Gemstones that are not immediately apparent or easily visible. These stones are often set into the side of a piece of jewelry, or as with rings, on the shank close to a larger gemstone that juts out from the piece as though shaded by the larger stone.
pegmatite	A coarse, intrusive igneous rock featuring extremely large crystals (some over 50mm in size) Over 550 different minerals have been found in pegmatites, many of which include gemstone quality gems like beryl, aquamarine, tourmaline, garnet, kunzite, and topaz to name a few. Pegmatites also remain a source for rare precious metals.
pendant	Any charm that is used on a chain necklace. Pendants, unlike necklaces, can be switched from chain to chain. They feature a fixed bale and as long as the bale is wide enough to fit over a clasp, it can be worn with that chain. A necklace features a chain that connects directly to the featured design and so cannot be removed.
peridot	A yellowish-green variety of olivine used as a gem.
pewter	A metal alloy that contains both tin and lead. Due to the lead it has a slightly dull appearance and can never be polished to a high gloss.
physical vapor deposition	A thin-film deposition process in which a material (metal, alloy, compound, cermet, or composite) is either evaporated or sputtered onto a substrate in a vacuum.
pierced work	Another term for open work wherein there are areas of the piece that are open to the back.
pin	A type of closure used on hinged bangle bracelets. Also a type of broach or decorative piece that attaches to a sweater, lapel, or shirt with a pin.