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Hornblende
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Studsdalen, Kragerø, Telemark, Norway
© Rob Lavinsky
| Hardness: | 6 | ||
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| Ferro-hornblende, Magnesio-hornblende | |||
An informal name for dark green to black amphiboles, mostly ferrohornblende or magnesiohornblende. Deer, W.A., R.A. Howie and J. Zussman (1997) Rock-forming minerals, volume 2b, double chain silicates. use the term "hornblende" as a group name for all aluminous amphiboles in the calcium amphibole subgroup.
Classification of Hornblende | |||||||||||||||||||||||||||||
| mindat.org URL: | http://www.mindat.org/min-1930.html Please feel free to link to this page. | ||||||||||||||||||||||||||||
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Physical Properties of Hornblende | |||||||||||||||||||||||||||||
| Streak: | Colorless | ||||||||||||||||||||||||||||
| Hardness (Mohs): | 6 | ||||||||||||||||||||||||||||
| Density (measured): | 3 - 3.4 g/cm3 | ||||||||||||||||||||||||||||
Other Names for Hornblende | |||||||||||||||||||||||||||||
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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. | ||||||||||||||||||||||||||||
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Localities for Hornblende | |||||||||||||||||||||||||||||
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The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the
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The symbol next to localities in the list
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