Orthorhombic

Orthorhombic

Found in low-temperatures hydrothermal veins or replacement deposits and in hot spring deposits, this mineral is characterized by its bladed crystals and lead-gray color. The name reflects its antimony content. The Greek name for the mineral was "stibi" from whence came Latin stibium and the old name for the element antimony (Sb).

Characterized by its cockscomb form, this mineral was named in 1845 after an Arabic or Moorish name applied to pyrite and similar metallic bronze-colored minerals. It is frequently found replacing organic matter, forming fossils, and in sedimentary beds, particularly coal beds.

Known as the "peacock ore" due to it quickly tarnishing to an iridescent purple after exposure to air and moisture, this mineral has been known since 1725, but was not given its current name until 1845 when it was named for Ignaz von Born (1742-1791), an Austrian mineralogist. A widely occurring copper ore, it is usually found associated with other copper minerals in hypogene deposits.

Typically found as dark-grey to black massive material, it is distinguished by its cleavage. It occurs in moderate temperature vein and replacement deposits. Discovered in 1850, its name comes from the Greek meaning "distinct," in allusion to the cleavage. It is an ore of copper.

By far the most common strontium mineral, celestite closely resembles barite. It is used in the preparation of strontium nitrate for fireworks and tracer bullets and other strontium salts used in the refining of beet sugar. It was named in 1791 from the Greek word for "celestial", in allusion to the faint blue color of the original specimen.

Also spelled “barite,” this mineral is recognized by its high specific gravity and characteristic cleavage and crystals. It is a common mineral of wide distribution, occurring as a gangue mineral in hydrothermal veins and limestone. More than 80% of this mineral is used in the oil and gas industry as a drilling mud. It is named from the Greek word meaning "heavy," in allusion to its high specific gravity.

Named after the type locality at the Antler Mine in Arizona, this mineral is a secondary mineral occurring in the oxidized zone of copper deposits in arid regions. It was the chief ore mineral at Chuquicamata, Chile, the largest open pit copper mine in the world.

A minor ore of lead, this mineral was discovered in 1832 on the island of Anglesey, from which it is named, in Wales, United Kingdom. It is recognized by its high specific gravity, adamantine luster, and association with galena. It is a common supergene mineral found in the oxidized portions of lead deposits.

One of the most common minerals, goethite is typically formed as a weathering product of iron-bearing minerals. It was named for the German poet, novelist, playwrite, philosopher and geoscientist Johann Wolfgang von Goethe (1749-1832). It is used as an ore of iron.

Discovered in 1801, this mineral’s name is derived from a Greek word meaning "to scatter", in allusion to its decrepitation (emit a crackling sound) when heated. It occurs with other minerals in bauxite deposits and is used as a refractory.