Quartz

Quartz

Color- Colorless through various colors to black has many colors Crystal sysetem- trapezohedral class cleavage- Indistinct fracture- Conchoidal Hardness 7 lower impure luster Vitreous – waxy to dull when massive

with each oxygen being shared between two tetrahedral the density of this is 2.65 - 2.66 g/cm3
 * Streak white **
 * it is made of Silica, belongs to the hexagonal system **
 * it is formed by silicon-oxygen tertahedra **

it is found in europ and such as newgrange or carrowmore in Ireland uses for it are Quartz is important in the production of soaps and ceramics many electronic uses

quartz has many names like and

http://www.minerals.net/mineral/silicate/tecto/quartz/quartz.htm