The above specimen seen in Ultra
Violet light.
CHEMISTRY - CaWO4
CRYSTALLOGRAPHY - Tetragonal
CRYSTAL GROWTH AND HABITS - Scheelite crystals are most commonly dipyramidal, sometimes tabular. Scheelite can also be massive or granular.
COLOR AND OPTICAL PROPERTIES - Colorless to white, yellow to brownish, also gray, reddish or orange. Scheelite is transparent and fluoresces bluish in ultra violet light.
HARDNESS - 4.5 - 5
SPECIFIC GRAVITY - 6.1
LUSTER - Vitreous to sub adamantine
STREAK - White
BREAKABILITY - Distinct cleavage along {101}, fracture subconchoidal to uneven; brittle.
OCCURRENCE - Scheelite is found in contact metamorphic deposits (tactites) of granitic rocks as they infringe upon limestone. It can also form in high temperature quartz rich hydrothermal veins.
ASSOCIATED MINERALS - Wolframite (rarely), Garnet, Diopside, Hornblende, Cassiterite, Tourmaline, Apatite, Topaz.
MINERAL NAME - Named in honor of the Swedish chemist K. W. Scheele who analyzed the tungsten in the mineral.