Mineral Name Augite
First Discovered 1792
Nickel-Strunz Classification 09.DA.15
Dana Classification 65.01.03a.03
ICSD 9257
Mineral Group Silicates

 

Augite was named by Abraham G. Werner in 1792 from the Greek αυγή ("auge") for "shine" or "luster," in allusion to the appearance of its cleavage surfaces. Occasional specimens have a shiny appearance that give rise to the mineral's name however; " ordinary specimens have a dull dark green, brown or black finish.

Within the metaphysical realm of minerals, augite can be used to enhance the understanding of metamorphosis in one's life. Augite can be used to ameliorate the more trying transformations. Purple Augite can be useful for providing guidance during spiritual growth. Brown Augite useful for clearing oneself of "muddy" emotional, spiritual, or physical issues. Streaked black Augite for healing painful transformations while allowing one to remain grounded and centered in reality.

Please note that MIROFOSS does not suggest in any way that minerals should be used in place of proper medical and psychological care. This information is provided here as a reference only.

Augite is generally used in the manufacture of ceramics and for ceramic glazing materials.

Augite is a major rock forming mineral and can be found in igneous, ultramafic and some some high grade metamorphic rocks.

Augite is a solid solution in the pyroxene group. Diopside and hedenbergite are important end members in augite. The calcium content of augite is limited by a miscibility gap between itself and pigeonite as well as orthopyroxene. When augite occurs with either of these other pyroxenes, the calcium content of augite is a function of temperature and pressure, but mostly of temperature, and so can be useful in reconstructing temperature histories of rocks. With declining temperature, augite may exsolve lamellae of pigeonite and/or orthopyroxene. There is also a miscibility gap between augite and omphacite, but this gap occurs at lower temperature and is not well understood.

Other than in the basic mineral form, augite can be found in six distinct varieties:

Cleavage Perfect
Colour(s) Brown green, Light brown, Dark brown, Black
Specific Gravity 3.40
Diaphaneity Translucent to Opaque
Fracture Brittle - Conchoidal - Very brittle fracture producing small concoidal fragments
Mohs Hardness 5.0 to 6.5
Luminescence Non-fluorescent
Luster Vitreous to Resinous
Streak Greenish gray
Habit(s) Columnar to Granular to Massive
Radioactivity Non-radioactive
Magnetism Non-magnetic

No known health risks have been associated with augite. However ingestion of augite, as with other naturally occurring minerals, is not recommended.

The following image shows the elemental breakdown of the mineral augite along with the mineral crystal structure.

Crystal System Monoclinic
Class Prismatic
Axial Ratios a : b : c = 1.0888 : 1 : 0,5833
Morphology Stubby prismatic crystals
Optical Data Type Biaxial (+)
Pleochroism (x) Pale green, Pale Brown, Green
Pleochroism (y) Pink, Yellowish green
Pleochroism (z) Pale green, Grayish green, Violet
RL Values nα = 1.680 - 1.735 nβ = 1.684 - 1.741 nγ = 1.706 - 1.774
2V Measured: 40° to 52°, Calculated: 48° to 68°
Max Birefringence δ = 0.026 - 0.039 (See colour chart at right)
Surface Relief High
Dispersion Weak to Distinct r > v

Augite can be referenced in certain current and historical texts under the following five names:


The mineral augite can be translated into the following select languages:

Arabic الأوجايت Bulgarian   Chinese (Sim) 普通辉石
Croatian Augit Czech Augit Danish  
Dutch Augiet Esperanto Aŭgito Estonian  
Finnish Augiitti French   German Augit
Greek   Hebrew אוגיט Hungarian Augit
Italian   Japanese 普通輝石 Korean  
Latin   Lithuanian Augitas Norwegian  
Persian   Polish Augit Portuguese  
Romanian   Russian Авгитт Slovak Augie
Spanish Augita Swedish Augit Tagalog  
Turkish   Ukrainian Авгіт Vietnamese  

Augite can be found in many places around the world. The map below shows major documented concentrations of augite:

The MIROFOSS database offers free printable geological identification tags for personal and non-profit use. These tags can be used to properly identify mineral samples in your collection. -Click here- to download a full size jpeg image for a augite identification tag; which can be printed on paper or used with a plastic laser printer.

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Chemical Composition Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., ISBN 0-471-80580-7
Crystallography Robinson, P., Ross, M., Nord, G.L., Smyth, J.R., and Jaffe, H.W. (1977) Exsolution lamellae in augite and pigeonite: fossil indicators of lattice parameters at high temperature and pressure. American Mineralogist: 62: 857-873.
Optical Data Phillips, W.R. and D.T. Griffin (1981) Optical Mineralogy: 196-198.
History Deer, Howie, and Zussmann (1997): 2A: 294-398.
Geographical Data Mindat.org. Retrieved on 2012-02-01
Physical Identification Webmineral.com. Retrieved on 2012-02-01.
February 02, 2012 The last time this page was updated
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