Prase, a variety of Quartz

Synonyms:  Edinite, Prasem, Prasio, Prasius
Variety of:  Quartz
Classification:  Oxides
Chemical formula:  SiO2
Crystal system:  Trigonal
Density (g/cm3):  2,65
Tenacity:  Brittle
Cleavage:  none
Fracture:  Conchoidal
Hardness (Mohs):  7
Colour:  Leek-green
Lustre:  Vitreous, silk luster, dull
Streak:  White