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Named in 1789 by Abraham Gottlieb Werner from an old German term for dark minerals with no ore value and from "blende", meaning to deceive.
An informal name for dark green to black amphiboles, mostly ferro-hornblende or magnesio-hornblende according to the current nomenclature.
In the book "Rock-forming minerals, volume 2b, double chain silicates" by Deer, Howie & Zussman (1997), the term "hornblende" is used as a group name for all aluminous amphiboles in the calcium amphibole subgroup.

Classification of Hornblende URL:
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Physical Properties of Hornblende

Hardness (Mohs):
3 - 3.4 g/cm3 (Measured)    

Other Names for Hornblende

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hornblende

Reference List:
Barnes, V.E. (1930) hanges in hornblende at about 800°. American Mineralogist: 15: 393-417.

Dodge, F.C.W. JJ. Papike & R.E. May (1968), Hornblendes from granitic rocks of the central Sierra Nevada batholith, California: Jour. Petrology: 9: 378-410.

Robinson, K., Gibbs, G.V., Ribbe, P.H., and Hall, M.R. (1973) Cation distribution in three hornblendes. American Journal of Science: 273A: 522-535.

Spear, F.S. (1981) An experimental study of hornblende stability and compositional variability in amphibolite. American Journal of Science: 281: 697-734.

Litvin, M.A., Platonov, A.N., and Khomenko, V.M. (1986) Effect of titanium isomorphic impurity on the colour and pleochroism of hornblende. Mineralogicheskii Sbornik Lvov: 40: 30-36.

Hawthorne, Frank C. and Roberta Oberti (2006): On the classification of amphiboles: Canadian Mineralogist: 44(1), 1-21.

Internet Links for Hornblende

Localities for Hornblende

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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