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Antlerite; creidt: RRUFF


An uncommon mineral composed of dibasic copper sulfate. Antlerite is an emerald green to blackish-green color and is found in the oxidized zones of copper deposits of Arizona and Chile. It has also been identified as a corrosion product on outdoor bronze and copper sculpture. Though similar in color to Malachite and Brochantite, antlerite does not effervesce in contact with acid.

Synonyms and Related Terms

antlerita (Esp.); antierite (Port.); Antlerit (Deut.); antleriet (Ned.)


Antlerite PMA.TIF


Antlerite infrared RRUFF R050212.png

Raman (RRUFF)

Antlerite Raman RRUFF R050212.png

Physical and Chemical Properties

An Crystal system = orthorhombic bipyramidal Cleavage = unidirectional Fracture = uneven Luster = vitreous Streak=pale green

Composition Cu3(OH)4SO4
Mohs Hardness 3.5-4.0
Density 3.88 g/ml
Refractive Index 1.72-1.78

Resources and Citations

  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996