Scheelite Information
Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten, used in the production of tungsten alloys and for making filaments for electric lamps.
Physical Properties of Scheelite
- Color: brownish yellow, orange, greenish yellow, yellow, brown, black, colorless
- Crystal System: Tetragonal
- Hardness: 4.5 - 5.0
- Cleavage: {110} Indistinct, {001} Indistinct
- Luster: Vitreous (Glassy)
- Streak: White
- Transparency: Transparent, Translucent
- Specific Gravity: 5.9 - 6.1 (Heavy)
- Diaphaneity: Transparent to translucent
Optical Properties of Scheelite
- Refractive Index: 1.920 - 2.010
- Birefringence: 0.080 - 0.090
- Pleochroism: Weak
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Occurrences of Scheelite
Scheelite is found in hydrothermal veins, granitic rocks, and in skarns. It is also found in contact metamorphic deposits and in high-temperature greisen deposits. It is commonly associated with minerals such as calcite, fluorite, apatite, wolframite, molybdenite, and topaz.
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