Zircon

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Zircon
Zircon crystals.jpg
Chemical name Zirconium silicate
Chemical formula ZrSiO4
Identification
Colors Colorless, yellow, grey, red, green, brown, black
Crystal habit Dipyramidal prismatic
Crystal system Tetragonal
Cleavage Poor/Indistinct
Fracture Conchoidal to uneven
Hardness 7.5
Name origin The name comes from its containing the element, zirconium; which was named from the Arabic, zar and gun, meaning gold and color.
Specific gravity 4.6–4.7
Streak White