| Warwickite | |
|---|---|
Warwickite sample |
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| General | |
| Category | Mineral |
| Chemical formula | (Mg,Fe2+)3Ti[O|BO3]2 |
| Strunz classification | 06.AB.20 |
| Identification | |
| Color | dark brown, grey to black¨ |
| Crystal system | orthorhombic |
| Cleavage | perfect on {100} |
| Fracture | irregula/uneven |
| Mohs scale hardness | 3-4 |
| Luster | sub-Vitreous, pearly, sub-metallic, dull |
| Streak | bluish black |
| Specific gravity | 3.34 - 3.36 |
Warwickite is an iron magnesium titanium borate mineral with formula: (MgFe)3Ti(O, BO3)2 or Mg(Ti,Fe3+, Al)(BO3)O. 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.[1][2]
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.[3]
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