Anhydrite

saf-ahyuh r

Anhydrite’s name can be translated to “without water”. The only difference between anhydrite and gypsum is that it lacks water. It produces mineral specimens that have fan like sprays or cubes. It is used for soil treatments, construction materials, and used as the source of sulfur in sulfuric acid.

Anhydrite Rough
Anhydrite Classification
Common Name Anhydrite
Species Anhydrite
Anhydrite Optical Properties
Transparency Translucent-Transparent
Dispersion Strength: Weak Fire Value: 0.013
Refractive Index 1.570-1.614
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence LWUV: blue, pink, white
CCF Reaction blue, red, white
Anhydrite Characteristic Physical Properties
Streak White
Luster Vitreous, Greasy, Pearly
Stability Brittle
Fracture Uneven to Splintery
Cleavage Perfect cleavage in 3 directions often forming cubes
Anhydrite Chemistry & Crystallography
Chemical Name Calcium sulfate
Chemical Formula CaSO4
Crystal System Orthorhombic
Chemistry Classification Sulfate

Anhydrite Colors

  • Brown Anhydrite Brown
  • White Anhydrite White
  • Colorless Anhydrite Colorless
  • Blue Anhydrite Blue
  • Gray Anhydrite Gray
  • Red Anhydrite Red
  • Pink Anhydrite Pink

Alternate Names

Cube spar

Countries of Origin

Papua New Guinea; Angola; Kazakhstan; Portugal; Greece; Mongolia; Morocco; Mali; Panama; Guatemala; Iraq; Chile; Argentina; Ukraine; Zambia; India; Canada; Turkey; Belgium; Namibia; Finland; South Africa; Georgia; Peru; Turkmenistan; Germany; Tanzania, United Republic Of; Fiji; Viet Nam; Madagascar; Thailand; Costa Rica; Sweden; Russian Federation (the); Poland; Bulgaria; Jordan; United States Minor Outlying Islands (the); Tunisia; Kenya; Switzerland; Spain; Djibouti; Cuba; Burkina Faso; Lao People's Democratic Republic (the); Israel; Australia; Tajikistan; Myanmar; Malaysia; Iceland; Oman; Armenia; Austria; Mozambique; El Salvador; Brazil; Algeria; Slovenia; Colombia; Ecuador; Iran (Islamic Republic of); Hungary; Congo (the); Japan; Taiwan (Province of China); Bolivia (Plurinational State of); New Zealand; Vanuatu; Italy; Antarctica; Ethiopia; Afghanistan; Czechia; Egypt; Malta; Saudi Arabia; Pakistan; China; Ireland; Qatar; Slovakia; France; Lithuania; Serbia; Kyrgyzstan; United Kingdom of Great Britain and Northern Ireland (the); Romania; Dominican Republic (the); Uzbekistan; Netherlands (the); Norway; Denmark; Mexico; Zimbabwe; Philippines (the); Greenland; Indonesia

Care

Special care needs to be taking with anhydrite because it is brittle with perfect cleavage and will alter to gypsum if exposed to water.

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Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.