Zircon
Chemical Formula	ZrSiO4
Species	Silicates
Crystal System	Tetragonal
Mohs Scale	7
Specific Gravity	4.6-4.7
Color	Reddish brown, yellow, green, blue, gray, colorless; in thin section, colorless to pale brown
Streak	White
Luster	Adamantine, Vitreous, Greasy
Refractive Index	n = 1.925 - 1.961 n = 1.980 - 2.015
Diaphaneity	Transparent, Translucent, Opaque
Cleavage	Poor/IndistinctIndistinct on
Fracture	Conchoidal
Crystal Habit：tabular to prismatic crystals, irregular grains, massive
Geological Setting：An accessory mineral in igneous and metamorphic rocks.