| Gemstone Chart |
 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 Beryl
Beryl is a semi-precious clear gemstone which usually comes in greens, yellows, and occasionally pinks, ands various shades thereof.
Color: Green, blue, pink, yellow, 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: Austria, Columbia, Brazil, Russia, East Africa, Australia, Madagascar, South Africa, Zimbabwe, India, Pakistan, Zambia, Nigeria, U.S.A., Afghanistan
|  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 Chrysoprase
Chrysoprase is a gemstone variety of chalcedony or cryptocrystalline quartz, colored by trace amounts of nickel.
Categories: semi-precious stone
Chemical Composition: SIO2
Crystal Group: Hexagonal
Refractive Index: 1.544 - 1.553
Hardness: 7
Density: 2.65 - 2.66
Occurrence: Australia, Tanzania
|  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
|  Natural Musgravite
Musgravite is an extremely rare member of the taaffeite family that was discovered in 1967 in the Musgrave Range of South Australia. It is also one of rare gemstones that have been sought these years for the collection at GAAJ laboratory.
Color: pale olive green, grey, mauve, grey purple
Categories: semi-precious stone
Chemical Composition: (Fe2+,Zn,Mg)2Al6BeO12
Crystal Group: Hexagonal
Refractive Index: 1.717 - 1.739
Density: 3.68
Occurrence: The Musgrave Mountain Ranges in Central Australia
|  Natural Rubelite
The rubellite is a particularly beautiful gemstone from the colourful family of the tourmalines. Its colour shines in the most beautiful nuances from red to shocking pink. Rubelite is rich in lithium and free of magnesium and iron.
Color: Hot Pink to Intense red
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: Brazil, Madagascar, Nigeria, U.S.A.
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