Warwickite
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Warwickite is an iron magnesium titanium borate mineral with the chemical formula or . It occurs as brown to black prismatic orthorhombic crystals which are vitreous and transparent. It has a Mohs hardness of 3 to 4 and a specific gravity of 3.36.
Warwickite is an iron magnesium titanium borate mineral with the chemical formula or . It occurs as brown to black prismatic orthorhombic crystals which are vitreous and transparent. It has a Mohs hardness of 3 to 4 and a specific gravity of 3.36. ==Occurrence== It occurs metasomatized limestone skarns and in lamproite and carbonatite veinlets. It was first described in 1838 near Warwick, Orange County, New York. It has also been reported from Bancroft, Ontario; in Murcia Province, Spain; in Siberia and near Pyongyang, North Korea. ==References==
Text derived from https://en.wikipedia.org/w/index.php?oldid=1138999024 under CC BY-SA 4.0; modifications have been made.