Elbaite
Aventurine is quartz like citrine, chalcedony and tiger’s eye, but is most commonly available as green gemstones, though yellow, white and blue are also available. The green semi-precious stones are translucent to opaque, and give off platy shimmer that is called aventurescence. For blue/green gemstones, see aqua colored stones. Shown below are pictures of some common and uncommon green colored stones. The links below provide more information about a specific gemstone, pictures of jewelry made with the stone, or its corresponding birthstone facts. This page will show you pictures of all the green birthstones. There is a gemstone called Emerald. Emeralds are a variety of the mineral beryl (Be3Al2(SiO3)6,) colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5 - 8 on the 10 point Mohs scale of mineral hardness. Jewelry with green gem stones comes in a variety of different shades, including grassy green, apple green, emerald, forest, jade, Kelly green, lime, malachite, moss, olive and sea green. Beside black, red (rubellites) and yellow, tourmalines also occur as green stones. The green gemstones come the species of tourmaline called elbaite, which is further divided into two varieties: verdelite and indicolite, the latter also available in blue. Beside white, black, red and yellow, precious opal also occurs as green stones, or white/black stones that display a play of color involving green. Green fire against white background is the most common of the precious opals; green against black body tone is much more valuable. If yellow quartz is called citrine and violet quartz amethyst, green quartz is called prasiolite, also spelled praziolite. Like aventurine, prasiolite — also called vermarine or just green quartz — is a variety of quartz that occurs as green crystals. It appears as pale green to bright green. Though it is the green variety of beryl, not all gem-quality green beryls are called emeralds; yellow-green stones are called heliodors;soft blue-green or even pale green specimens are called aquamarines.. The typical color of emerald is a bea (read full). Also called titanite for its titanium content, sphene is a stone with brilliance that can exceed diamond, though of far lower hardness compared to the latter. Beside yellow and red, sphene also occurs as green gemstones, usually with yellow undertone. The green stones are very rare, and accordingly more expensive.
http://kamayojewelry.com/gemstone-colors/green-gemstone-names/ http://www.bernardine.com/gemstones/green.htm http://www.answers.com/Q/What_is_the_valuable_green_stone_called http://www.bernardine.com/gemstones/green.htm http://kamayojewelry.com/gemstone-colors/green-gemstone-names/ http://kamayojewelry.com/gemstone-colors/green-gemstone-names/ http://kamayojewelry.com/gemstone-colors/green-gemstone-names/ http://gem5.com/tag/dark-green/ http://kamayojewelry.com/gemstone-colors/green-gemstone-names/
what are green stones called