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Mineral Properties and Uses

Physical Properties of Witherite

Chemical Classification carbonate
Color white, colorless, light grayish, yellowish brown
Streak white
Luster vitreous
Diaphaneity transparent to translucent
Cleavage fair, distinct
Mohs Hardness 3 to 3.5
Specific Gravity 4.3 to 4.4
Diagnostic Properties specific gravity, effervesces in dilute HCl
Chemical Composition BaCO3
Crystal System orthorhombic
Uses barium

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Witherite from Hexham, England. Specimen is approximately 4 inches (10 centimeters) across.

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