General Category Nesosilicates රසායනික සූත්‍රය zirconium silicate ZrSiO4 Strunz classification 09.AD.30 Crystal symmetry Tetragonal ditetragonal dipyramidal H-M symbol: (4/m 2/m 2/m) Space group: I 41/amd Unit cell a = 6.607(1) Å, c = 5.982(1) Å; Z=4 Identification පාට / පැහැය Reddish brown, yellow, green, blue, gray, colorless; in thin section, colorless to pale brown Crystal habit tabular to prismatic crystals, irregular grains, massive Crystal system Tetragonal Twinning On {101} Cleavage indistinct, on {110} and {111} Fracture Conchoidal to uneven Tenacity Brittle Mohs scale hardness 7.5 Luster Vitreous to adamantine; greasy when metamict.