Green Crystal Part 2

Copper silicate found in veins of copper oxidized by air/water; forms some crystals; usually squarish, six-sided prisms

Member of the pyroxene group of minerals; common in calcium-rich metamorphic rocks; crystals are rare; less common varieties include colours black, blue, and yellow

Similar in structure and appearance to tourmaline; recently identified as a mineral (early part of 20th century); vitreous to dull lustre

Found in two forms (an actinolite & a pyroxene); reverence is vastly widespread; has attributes to various cultures; less common varieties include colours blue-ash, white, grey

Translucent olive-green in colour; frequently occurs in metamorphic rocks; forms strange looking, flattened wedge-shape crystals; its name means "wedge" in ancient Greek

Name derives from the ancient belief that the stone was a remedy against snake bites; coloration is reminiscent of snakeskin; metamorphic; fibrous form is asbestos (chrysotile)

Secondary mineral of copper deposits; single crystals are rare; name derives from the Greek for the mallow plant "maloche"; has dark green or black concentric bands

Amorphous tektite; only found in Czech Republic; only tektite with a green transparency; larger pieces are rare; commonly form extruded, teardrop or pebble shapes

Translucent chalcedony quartz; has inclusions of green and brown manganese oxides, hornblende, and iron; Red Sea has an ancient source where it was called "mocha stone"