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Tanzanite was first discovered in Merrani, Arusha, Tanzania in 1967. The local Maasai people believe that the earth was hit by lightning and ignited the "God's Fire", which scorched the crystals in the earth into shiny blue and purple gems, which are attractive...

Chlorite belongs to the monoclinic system, which is usually a scale-like or dense massive aggregate. The color varies with the iron content, including dark-green, green, gray-green, black, white to light green streaks, pearly to earthy luster, transparent to opaque,...

Chromium diopside is a kind of gem that has just appeared in the jewelry market in recent years. With its green color and crystal clear quality, it soon won people's favor and was praised as the sister stone of emerald. Chromic diopside is called Siberian emerald in...

Diopside belongs to the pyroxene family, monocline system, and the crystal is short columnar, transparent to opaque, with glass luster. The color is light green to dark green. With the increased iron content, the color will deepen to brown or even black. Diopside is a...

Aragonite is named after the province of Aragon in Spain, where the mineral was found for the first time. Its Composition is Ca [CO3], containing Sr, Ba, Pb, Mg, Fe, Zn, etc. Aragonite and calcite have the same chemical composition but different crystal structures....

Shattuckite is a copper-containing hydroxy silicate. The chemical formula is Cu5 [SiO3] (OH) 2. It belongs to the Orthorhombic crystal system, and the crystal is thin and long prismatic, and granular, dense, massive and fibrous aggregates are common; Basic Property of...

Ven Richthofen first proposed the term rhyolite in 1860. At that time, it was referred to as acidic lava with flowing belt structure. Almost at the same time, Roth (1860) named the acidic lava produced on the Mediterranean Lipari Islands as liparite and later adopted...