Nuumite

(repeating unit) || Silica (silicon dioxide, SiO 2 ) ||
 * ~ Category || Oxide mineral ||
 * ~ Formula
 * ~ Identification ||
 * ~ Formula mass || 60 g / mol ||
 * ~ Color || Various ||
 * ~ Crystal system || Trigonal, Monoclinic ||
 * ~ Cleavage || Absent ||
 * ~ Fracture || Uneven, conchoidal ||
 * ~ Mohs scalehardness || 6–7 ||
 * ~ Luster || Vitreous, silky ||
 * ~ Streak || White ||
 * ~ Diaphaneity || Translucent ||
 * ~ Specific gravity || 2.65–2.667 ||

Onyx, from wikipedia.com/Onyx By: Liam Hays-Ekeland