Monday, September 26, 2011

How to select rose quartz Gemstone beads Strand Guide

ROSE QUARTZ, the pink variety of quartz
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VARIETY INFORMATION:VARIETY OF: Quartz , SiO 2 , Silicon Dioxide. USES: Gemstone and ornamental stone. COLOR: various shades of pink to a rosy-red. INDEX OF REFRACTION: 1.544-1.553 BIREFRINGENCE: 0.009 HARDNESS: 7 CLEAVAGE: none CRYSTAL SYSTEM: trigonal
Rose quartz is one of the most desirable varieties of quartz. The pink to rose red color is gepletely unique, unlike any other pink mineral species. The color is caused by iron and titanium impurities. Rose quartz is used as an ornamental stone and as a gemstone. Although rose quartz is usually too cloudy to be used as a cut gemstone, a few exceptional pieces are found with enough clarity and color to make fine gems. Most gemmy rose quartz is used as cabochons where the clarity is not as important as the color. Rose quartz is also a very attractive ornamental stone and is carved into popular spheres, pyramids, obelisks, figurines and ornate statues.
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Rose quartz is found in Madagascar, India, Germany and several localities in the USA. Much rose quartz was extracted from a famous site near Custer, South Dakota, but now, most of the worlds supply of good carvable rose quartz gees from Brazil.
Brazil is also the only source of true well formed crystals of rose quartz. All rose quartz was believed to be only massive, found primarily in the cores of pegmatites. This lack of crystals is somewhat of a curiosity because quartz crystallizes into well formed crystals in all its other macroscopic varieties. So amazing are the rose quartz crystals that the first ones discovered were dismissed as fakes by mineralogists from around the world.
If rutile needles are present in the rose quartz then a star effect or asterism is sometimes seen. The star is best seen when light is viewed through the rose quartz. This is different from asterisms in most other gemstones, such as ruby and sapphire, where the stars are seen when light is shown on the gems. Rose quartz is only one of several quartz varieties. Other varieties that form macroscopic (large enough to see) crystals are as follows:
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