| Gemstone Chart |
 Natural Idocrase
Primarily a green color that will resemble jade.idocrase is one stone that is sometimes mistaken for jade by jewelers and consumers alike. Idocrase is from the greek and means mixed form, an allusion to its crystals showing a mixture of other mineral forms.
Color: normally green, but also can be brown, yellow, blue and/or purple.
Categories: semi-precious stone
Chemical Composition: nesosilicate or sorosilicate
Crystal Group: Tetragonal
Refractive Index: 1.71 - 1.73
Hardness: 6.5
Density: 3.3 - 3.5
Occurrence: Quebec, Canada; California and the New England region of USA; Mt Vesuvius, Italy; Ural Mountains, Russia, Switzerland, East Africa
|  Natural Peridot
Peridot is the best known gem variety of olivine, a species name for a series of magnesium-iron rich silicate minerals.It is one of the prettiest of all green gems.Most peridot formed deep inside the earth and was brought to the surface by volcanoes. Some has also come to Earth in meteorites, but this extraterrestrial peridot is extremely rare, and you're not likely to see it in a retail jewelry store.
Color: Green, olive.
Categories: semi-precious stone
Chemical Composition: (Mg,Fe)2(SiO)4
Crystal Group: Orthorhombic
Refractive Index: 1.654-1.689
Hardness: 6.5
Density: 3.34
Occurrence: China, Burma, East Africa, U.S.A., and Vietnam
|  Natural Phenakite
phenakite is a fairly rare nesosilicate mineral consisting of beryllium orthosilicate, It is one of the brightest of the colorless gemstones.Madagascar seems to be the most important source for this rare stone.
Color: White
Categories: semi-precious stone
Chemical Composition: Be2SiO4
Crystal Group: Hexagonal
Refractive Index: 1.651-1.696
Hardness: 7.5-8.0
Density: 2.94--2.96
Occurrence: Russia, Madagascar, U.S.A., Brazil, France, Switzerland, Ceylon, E. Africa.
|  Natural Rhodolite
Rhodolite is a beautiful pink to violetish red garnet which was named after the rhododendron flower. Commercially rhodolite is one of the most important garnets. Rhodolite is quite available in small sizes which are relatively low in price. Very fine large rhodolite garnets are rare and are moderate in price.
Color: red, purple-red
Categories: semi-precious stone
Chemical Composition: Al2(SiO4)3
Crystal Group: Cubic
Refractive Index: 1.75 - 1.77
Hardness: 7.25
Density: 3.74 - 3.94
Occurrence: Brazil, East Africa, Ceylon, India, Madagascar, Zimbabwe
|  Natural Ruby
ruby is a pink to blood-red gemstone, a variety of the mineral corundum.Ruby has been the world's most valued gemstone for thousands of years. It was said to be the most precious of the twelve stones God created when he created all things and this "lord of gems" was placed on Aaron's neck by God's command.
Color: red, orangey red, violetish red
Categories: precious stone
Chemical Composition: AL2O3
Crystal Group: Hexagonal
Refractive Index: 1.759-1.778
Hardness: 9
Density: 4
Occurrence: Burma, Thailand, East Africa, Vietnam, Madagascar.
|  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 Star Sapphire
A star sapphire is a lovely gem that exhibits a six pointed star because of the intersection of six thin intersecting inclusions. When the gem is lit from above, the inclusions become quite visible and the star shape appears.A powdery grey-blue star sapphire is the centerpiece of a ring from the Art Deco period.
Color: Blue, green blue, violet, blue, black, brown, pink.
Categories: semi-precious stone
Chemical Composition: AL2O3
Crystal Group: Hexagonal
Refractive Index: 1.759-1.778
Hardness: 9
Density: 4
Occurrence: Sri Lanka, Burma, India, East Africa, Ankarana-Madagascar, Thailand.
|  Natural Sunstone
Sunstone is a sodium-calcium-aluminum-silicate variety of plagioclase feldspar, which when viewed from certain directions exhibits a brilliant spangled appearance; this has led to its use as a gemstone.
Color: Orange-red, brownish-red
Categories: semi-precious stone
Chemical Composition: NaAlSi3O8
Crystal Group: Triclinic
Refractive Index: RI 1.54 ¨C1.55
Hardness: 6
Density: SG 2.62 ¨C 2.65
Occurrence: Near Lake Baikal Russia; East Africa; Hastings, Renfrew, and Haliburton, in Ontario Canada; Tvedestrand, Hitero, Norway; Kangayam, India; Maine, Oregon, New Mexico, California, and North Carolina, USA.
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