Zircon

General Information: Chemical Formula:ZrSiO4 Composition:(Molecular Weight = 183.31 gm)Zirconium 49.77 % ZrSilicon 15.32 % SiOxygen 34.91 % O  Empirical Formula: ZrSiO4 Environment:Magmatic, metamorphic, pegmatitic, and alluvial rocks.. Locality:Laacher See, Niedermendig, Germany. Name Origin:Named from its containing the element, zirconium; which was named from the Arabic, zargun = "gold color."Physical Properties: Cleavage:[110] Indistinct Color:brown, reddish brown, colorless, gray, or green. Density:4.6 - 4.7, Average = 4.65 Diaphaniety:Transparent to translucent to opaque Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction., Crystalline - Fine - Occurs as well-formed fine sized crystal s. Hardness:7.5 - Garnet Luminescence:Fluorescent and radioactive, Short UV=yellow, Long UV=dull red. Luster:Adamantine Streak:whiteMore details...