Gemstone Chart |
Natural Jadeite A rare, usually green mineral of the pyroxene group. Jadeite can also occur in white, auburn, buff, or violet varieties. The most highly valued form of jade consists of jadeite.Jade has a history in China of at least four thousands years.Experts believe that, although more expensive, diamonds and gold cannot be compared with jade - jade is animated with a soul. Color: Pure white thru pink, brown, red, orange, yellow, mauve, violet, blue, and black, to an extensive range of green and mottled green and white. Categories: semi-precious stone Chemical Composition: NaAl(SiO3)2 Crystal Group: Monoclinic Refractive Index: 1.654 - 1.667 Hardness: 7 Density: 3.32 Occurrence: Northern Myanmar. Non commercial discoveries of Jadeite have also been reported in China; Russia (in the Polar Urals); Niigata, Japan; San Benito County, California, USA, and Guatemala.
| Natural Kornerupine Kornerupine is a rare mineral occasionally used as a gemstone. It appears frequently in parcels from Ceylon and may be confused with beryl, peridot, topaz, or quartz. Color: Brown, brownish red, yellow-green, light green, blue green Categories: semi-precious stone Crystal Group: Orthorhombic Refractive Index: 1.665 ¨C 1.683 Hardness: 6.5 Density: 3.25 - 3.35 Occurrence: Ceylon, Tanzania
| Natural Mali Garnet Mali Garnet is a mixture of grossular (calcium aluminum silicate) and andradite (calcium iron silicate ). It is a yellow-green variety of grossular with a slight overlap in the grossular-andradite series.Mali garnet is one of the latest discoveries in the garnet family. Color: yellow, brown, green. Categories: semi-precious stone Chemical Composition: Ca3Al2(SiO4)3 Crystal Group: Cubic Refractive Index: 1.72-1.748 Hardness: 7.25 Density: 3.65 Occurrence: Mali
| Natural Prehnite Prehnite is a hydrated calcium aluminum silicate that occurs in a soft yellow-green to apple-green color.It was a rare gemstone, most prehnite is translucent but transparent specimens are sometimes found.While you are unlikely to find it in your local jewelry store, gemstone dealers often have some supply. Deposits are found in South Africa, Australia, China, Scotland and the United States. Color: yellow green, brown, yellow brown, oil green Categories: semi-precious stone Chemical Composition: (CA2Al2SI3O10(OH)2) Crystal Group: Orthorhombic Refractive Index: 1.61 - 1.64 Hardness: 6 Density: 2.80 - 2.95 Occurrence: China, France, U.S.A., Scotland, Australia
| Natural Scapolite Scapolite is actually the name of a series between the sodium chloride rich mineral called marialite and the calcium carbonate rich mineral meionite.Scapolite was originally discovered in 1913 in the Mogok Stone Tract in upper Burma (Myanmar). Scapolite is a rare and little known gemstone. It is a beautiful gem that comes in many colors. Color: white, yellow, violet,pink Categories: semi-precious stone Chemical Composition: Na4Al3Si9O24Cl /CA4Al6Si6O24CO3 Crystal Group: Tetragonal Refractive Index: 1.54 - 1.577 Hardness: 6 Density: 2.6-2.71 Occurrence: Kenya, Mozambique, Madagascar, Burma, Brazil, Canada.
| Natural Scheelite Scheelite is a calcium tungstate mineral with the chemical formula CaWO4.With a hardness of 4.5 to 5 on the Moh's ScaleScheelite is a rather soft stone. Traditionally, it was considered a collector's gem and unsuitable for use in jewelry. Color: Yellowish-white, brownish, orange yellow Categories: semi-precious stone Chemical Composition: CaWO4 Crystal Group: Tetragonal Refractive Index: 1.918 - 1.937 Hardness: 4.5 - 5.0 Density: 5.9 - 6.1 Occurrence: Czechoslovakia; Italy; Switzerland; Finland; Cumberland, Cornwall, England; Santa Cruz, Sonora, Mexico; South Dakota, Conneticut, Colorado, Utah, California, Arizona, USA; New South Wales and Queensland, Australia; Mian Yang, and Ping Wu, Sezhuan, China; Hollinger Mine, Ontario, Canada;
| Natural Spessartite The Spessartite is one of the most popular of all garnets. It is highly desired by collectors, jewelry designers and gem lovers.The sources for gem quality spessartine are Sri Lanka and Brazil. Color: Orange, yellow, brown Categories: semi-precious stone Chemical Composition: Mn3Al2(SiO4)3 Crystal Group: Cubic Refractive Index: 1.79-1.81 Hardness: 7.25 Density: 4.14-4.20 Occurrence: Germany, Ceylon, Burma, Nigeria, Maevatanana-Madagascar, Isoanala-Madagascar, East Africa.
| Natural Sphalerite Sphalerite is one of the very few minerals that has a total of six directions of cleavage, and occurs in many different colors. It is an unusual rare gemstone which is craved for by people as it possesses more brilliance than diamonds. Color: Orange, yellow, brown, green Categories: semi-precious stone Chemical Composition: ZnS Crystal Group: Cubic Refractive Index: 2.37 Hardness: 3.5-4 Density: 4.05 Occurrence: Spain, Mexico
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