Chalcedony is a catch all term that includes many well known varieties of cryptocrystalline quartz gemstones. They are found in all 50 States, in many colors and color combinations, and in sedimentary,...
What is Labradorite,Sunstone,Amazonite ================================================================================================= Background on Feldspar Gemstones: The name "feldspar" comes from "field...
What is Turquoise, How to select Turquoise, ========================================================================================== Turquoise, the robin's egg blue gemstone worn by Pharaohs and Aztec Kings,...
CITRINE (lemon stone), the yellow and orange variety of quartz VARIETY INFORMATION:VARIETY OF: Quartz , SiO 2 . USES: Gemstone and ornamental stone. BIRTHSTONE FOR: November COLOR: various shades of yellow and...
What is Peridot , How to select Peridot guide =============================================================== Peridot is the best known gem variety of olivine, a species name for a series of magnesium-iron...
What is Aventurine, How to select Aventurine =================================================================================================== Aventurine is a very sweet inexpensive stone. It's claim to fame...
AMETHYST, the purple variety of quartz VARIETY INFORMATION:Variety of: Quartz , SiO2 . Uses: Gemstones and ornamental stones. Birthstone for: February Color: various shades of purple. Index of refraction:...
SMOKY QUARTZ, the black or brown variety of quartz ========================================================================= VARIETY INFORMATION:VARIETY OF: Quartz , SiO 2 . USES: Gemstone and ornamental...
Lapis lazuli Lapis lazuli is a gemstone of the kind that might have come straight out of the Arabian Nights: a deep blue with golden inclusions of pyrites which shimmer like little stars. This opaque, deep...
Garnet, the January birthstone, derived its name from the Latin word granatus, meaning like a grain, which refers to the mode of occurrence wherein crystals resemble grains or seeds embedded in the matrix....