Gemstone Chart |
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 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 – 1.693 Hardness: 6.5 - 7 Density: 3.29 Occurrence: Baja CA, USA; Tanzania
| 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 – 1.804 Hardness: 6.5 Density: 3.65 – 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 Brazilianite Brazilianite is a wonderful gemstone that is rare and hard to find. The main production area is in the Minas Gerais region of Brazil. Color: yellow, greenish yellow Categories: semi-precious stone Chemical Composition: A hydrous sodium aluminum phosph Crystal Group: Monoclinic Refractive Index: 1.603 - 1.623 Hardness: 5.5 Density: 2.940 - 2.998 Occurrence: Minas Gerais, Brazil; New Hampshire, U.S.A.
| Natural Calcite Calcite is a common mineral which occurs in transparent to semitranslucent forms in a wide variety of colors. Calcite is too soft to be of use in jewelry but, it is sometimes used in carvings or ornamental objects. Color: white, yellow, pink Categories: semi-precious stone Chemical Composition: CaCO3 Crystal Group: Triclinic Refractive Index: 1.486 - 1.658 Hardness: 3 Density: 2.7 Occurrence: Calcite is found all over the world.
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