| 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 Aquamarine
Aquamarine is a semi-precious gemstone frequently incorporated into some of the most modern, beautiful handmade jewelry in the world. It is most often found in shades of clear ocean blue, and is widely recognized as the March Birthstone and the gemstone for the 18th anniversary.
Color: Blue, Green-blue
Categories: semi-precious stone
Chemical Composition: Be3Al2(SiO3)6
Crystal Group: Hexagonal
Refractive Index: 1.577(+-.016), 1.583 (+-.017)
Hardness: 7.5
Density: 2.67-2.745
Occurrence: Brazil, China, India, Madagascar, Mozambique, Russia, and U.S.A.
|  Natural Benitoite
Benitoite is considered to be a semi-precious gemstone. Very limited in nature and available from only one spot on earth (San Benito County, California), Benitoite is among the 10 rarest gemstones on earth
Color: Blue, white, colorless
Categories: semi-precious stone
Chemical Composition: BaTiSi3O6
Crystal Group: Hexagonal
Refractive Index: 1.757 ¨C 1.804
Hardness: 6.5
Density: 3.65 ¨C 3.68
Occurrence: San Benito County, California
|  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 Bixbite
Bixbite is a specific kind of emerald stone known as beryl which is also known as red beryl, red emerald or scarlet emerald.
Color: Pink, Red
Categories: semi-precious stone
Chemical Composition: Be3Al2(SiO3)6
Crystal Group: Hexagonal
Refractive Index: 1.577(+-.016), 1.583 (+-.017)
Hardness: 7.5
Density: 2.67-2.745
Occurrence: Utah, U.S.A.
|  Natural Chrome Tourmaline
Chrome tourmaline is a beautiful bottle-green variety of the gemstone. Gem-quality chrome tourmaline is quite pricey and is found in East Africa.
Color: dark green, light green, yellowish green
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
|  Natural Chrysoberyl
The Chrysoberyl family is best known for the more valuable alexandrite and catseye varieties. Faceted chrysoberyl is a beautiful gem which is not as well known in its own right. Apart from the high hardness, it takes a good polish and has a good luster.
Color: yellow, green, color changing, red, blue-green, greenish-yellow or brown
Categories: semi-precious stone
Chemical Composition: BeAl2O4
Crystal Group: Orthorhombic
Refractive Index: 1.741 - 1.760
Hardness: 8.5
Density: 3.73
Occurrence: Ceylon, Tanzania, Russia, Madagascar, Brazil.
|  Natural Color Change Sapphire
A rare variety of sapphire, known as color changing sapphire, exhibits different colors in different light. A color change sapphire is blue in natural light, and violet in artificial light. A similar effect is also seen in alexandrite.
Color: Color changing blue to purple, greenish brown to red
Categories: semi-precious stone
Chemical Composition: AL22O3
Crystal Group: Hexagonal
Refractive Index: 1.759-1.778
Hardness: 9
Density: 4
Occurrence: Ceylon, East Africa
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