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:
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.
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
Physical Properties of Hornblende
Streak:
Colorless
Hardness (Mohs):
6
Density:
3 - 3.4 g/cm3 (Measured)
Other Names for Hornblende
Name in Other Languages:
Czech:Rohovec
Dutch:Hoornblende
Finnish:Sarvivälke
French:Hornblende
Hebrew:הורנבלנדה
Italian:Orneblenda
Japanese:普通角閃石
Polish:Hornblenda
Portuguese:Horneblenda
Simplified Chinese:普通角闪石
Swedish:Hornblände
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.
Hornblende in petrology
An essential component of (items highlighted in red)
- Igneous rock
- Metamorphic rock
Common component of (items highlighted in red)
- Igneous rock
- Normal crystalline igneous rock
- Sedimentary rock and sediment
References for Hornblende
Reference List:
Barnes, V.E. (1930) Changes 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.
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
mindat.org URL:
https://www.mindat.org/min-1930.html
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The following Hornblende specimens are currently listed for sale on minfind.com.
Burk's Falls highway roadcuts, Armour Township, Parry Sound District, Ontario, Canada