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Hornblende

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Hardness:6
Name: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.
Synonym of:Ferro-hornblende, Magnesio-hornblende


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

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Physical Properties of Hornblende

Streak:Colorless
Hardness (Mohs):6
Density (measured):3 - 3.4 g/cm3

Other Names for Hornblende

Synonyms:
AchromaiteAluminous AmphiboleAmphibolite (of Breithaupt)Cork FossilOrniblenda
RimpyliteSpeziaiteSyntagmatite (of Breithaupt)
Other Languages:
Czech:Rohovec
Dutch:Hoornblende
Finnish:Sarvivälke
French:Hornblende
German:Achromait
Rimpylit
Speziait
Hebrew:הורנבלנדה
Italian:Orneblenda
Japanese:普通角閃石
Polish:Hornblenda
Portuguese:Horneblenda
Simplified Chinese:普通角闪石
Spanish:Hornblenda
Achromaita
Rimpylita
Speziaita
Swedish:Hornblände
Varieties:
Hornblende-asbestos

Other Information

Health Warning: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.



Best Localities for Hornblende

Best of Species:Hornblende

Internet Links for Hornblende

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  • Specimens:The following Hornblende specimens are currently listed for sale on minfind.com.

    Localities for Hornblende

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