Hiddenite

Hiddenite is a variety of Spodumene. Spodumene is a pyroxene member of inosilicate mineral; lithium aluminium. It is an important ore of lithium. It occurs in lithium-bearing granite pegmatite dykes, often with other lithium bearing minerals such as eucryptite and lepidolite. Generally it is flattened, elongated, striated parallel to {100}.

Species: spodumene ♦ Chemistry: lithium aluminium LiAl(SiO3)2 ♦ Color: colorless, yellow, light green, emerald-green, pink to violet, purple, white, gray ♦ Cleavage: perfect ♦ Fracture: uneven to subconchoidal ♦ Transparency: transparent, translucent ♦ Luster: vitreous, dull ♦ Crystal System: monoclinic ♦ Moh's Hardness: 6.5-7 ♦ Localities: Afghanistan, Australia, Brazil, Madagascar, Pakistan, Canada, USA.