| Gemstone Chart |
 Natural Agate
Agate is a beautiful natural chalcedony stone, classified as a semi precious gem and has been used by people as early as the ancient Egyptians in and before 3000 BC! Agate is hard and tough enough to be incorporated into jewelry and other ornamental items.
Color: Blue, green, yellow,orange, brown, gray
Categories: semi-precious stone
Chemical Composition: SiO2
Crystal Group: Hexagonal
Refractive Index: 1.530 - 1.539
Hardness: 6.5 - 7
Density: 2.57 - 2.64
Occurrence: Scotland, U.S.A., India, England, Italy, Brazil, Uruguay, Germany, Egypt, Indonesia, and many other localities.
|  Natural Andradite
Andradite is a Garnet, belonging to the Garnet group. It has the most powerful luster of any garnet, and this makes it a reputable gem.
Color: brown, greenish brown, yellowish green, green
Categories: semi-precious stone
Chemical Composition: Ca3Fe2(SiO4)3
Crystal Group: Cubic
Refractive Index: 3.82 ¨C 3.85
Hardness: 6.5
Density: 1.888 ¨C 1.889
Occurrence: Mexico, Korea, Namibia, Russia, Iran, South Africa
|  Natural Axinite
Axinite is considered to be a semi-precious gemstone and while limited in nature, gems of good color and size are available, however, faceted stones above 1 carat are rare. Despite being a bit brittle, Axinite¡¯s brilliance and sumptuous colors ranging from a rich clove color to a vivid blue, make it a exquisite and unique gemstone that is keenly sought after by collectors and connoisseurs alike. Currently, the most in demand colors of Axinite are the earth toned browns.
Color: Yellow, brown, violet, brownish red
Categories: semi-precious stone
Crystal Group: Triclinic
Refractive Index: 1.673 ¨C 1.693
Hardness: 6.5 - 7
Density: 3.29
Occurrence: Baja CA, USA; Tanzania
|  Natural Bi Color Tourmaline
Bi color tourmaline is the name given to tourmaline which displays more than one color in the same cystal.It is classified as a semi-precious stone.
Color: Green, red, yellow, orange. Brown, green, pink
Categories: semi-precious stone
Chemical Composition: (NaCa)(LI,MgFe,Al)9B3Si6(O,OH)31
Crystal Group: Hexagonal
Refractive Index: 1.624(+.005, -.005) - 1.644(+.006, -.006)
Hardness: 7-7.5
Density: 3.06 (.05, +.15)
Occurrence: East Africa, Brazil, USA, Afghanistan, Nigeria, Madagascar
|  Natural Clinohumite
Clinohumite is a rare mineral and an especially rare gemstone. It is a member of the humite group of minerals, which includes humite, clinohumite, chondrodite, and norbergite.Only two sources of gem-quality material are known: the Pamir Mountains of Tajikistan, and the Taymyr region of northern Siberia.
Color: Brown, yellow, white, orange, or reddish brown
Categories: semi-precious stone
Chemical Composition: Magnesium Silicate Fluoride OH
Crystal Group: Monoclinic
Refractive Index: 1.625 ¨C 1.668
Hardness: 6 - 6.5
Density: 3.17 - 3.35
Occurrence: Extremely rare - gem quality found only in the Pamir Mountains, Tadzhikistan. Other mineralogical occurrences include, Mt. Vesuvius, Italy; Pargas, Finland; Llanos de Juanar, Malaga, Spain; Tilly Foster Mine, New York; Fort Defiance, Apache County, Arizona; Crestmore Quarry, Riverside County and Lower Lake, Fresno County, California; Luna, New Mexico and Franklin, New Jersey, USA.
|  Natural Diamond
Diamond is the ultimate gemstone, having few weaknesses and many strengths. It is well known that Diamond is the hardest substance found in nature.
Color: White, yellow, brown, black. Rarely, blue, red, or pink.
Categories: precious stone
Chemical Composition: C
Crystal Group: Cubic
Refractive Index: 2.417
Hardness: 10
Density: 3.52
Occurrence: Africa, Russia, Canada, Australia, India
|  Natural Enstatite
Enstatite is a relatively common mineral, but is rarely used for jewelry purposes. It is generally cut for gem connoisseurs and collectors rather than for the common consumer.
Color: Gray, green, brown, orange-brown, yellowish-brown, colorless, pale yellow.
Categories: semi-precious stone
Chemical Composition: MgSiO3
Crystal Group: Orthorhombic
Refractive Index: 1.663-1.673
Hardness: 5.5
Density: 3.26-3.28
Occurrence: South Africa, Burma, Tanzania, Sri Lanka, Kenya, Germany, Norway, Greenland
|  Natural Fluorite
Fluorite has a wide range of colors including yellow, blue, pink purple and green. It is an interesting and beautiful gemstone.
Color: Colorless, yellow, brown, green, blue, violet, pink
Categories: semi-precious stone
Chemical Composition: CaF2
Crystal Group: Cubic
Refractive Index: 1.43
Hardness: 4
Density: 3.18
Occurrence: Namibia, U.K., Switzerland, Nigeria, Czechoslovakia, Canada, Poland, Italy, Norway, Germany, U.S.A.
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