What is "warwickite"

Warwickite \War"wick*ite\, n. (Min.) A dark brown or black mineral, occurring in prismatic crystals imbedded in limestone near Warwick, New York. It consists of the borate and titanate of magnesia and iron.

n. (context mineralogy English) An iron magnesium titanium borate mineral occurring as brown to black prismatic orthorhombic crystals.

Warwickite is an iron magnesium titanium borate mineral with formula: ( Mg Fe) Ti( O, BO)or Mg(Ti,Fe, Al)(BO)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.