ˈbru̇ˌkīt noun
( -s )
Etymology: Henry J. Brooke died 1857 English mineralogist + English -ite
: a mineral consisting of titanium dioxide TiO 2 and identical in composition with rutile and octahedrite but occurring in orthorhombic crystals commmonly brown and translucent or brown to black and opaque (hardness 5.5-6, sp.gr. 3.87-4.08)