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GruneriteGrunerite is a mineral of the amphibole group of minerals with formula Fe7Si8O22(OH)2. It is the iron endmember of the grunerite-cummingtonite series. It forms as fibrous, columnar or massive aggregates of crystals. The crystals are monoclinic prismatic. The luster is glassy to pearly with colors ranging from green, brown to dark grey. The Mohs hardness is 5 to 6 and the specific gravity is 3.4 to 3.5. Product highlightIt was discovered in 1853 and named for Louis Gruner, a Swiss-French chemist who first analysed it. Grunerite is also known commercially by the name amosite. References
Categories: Inosilicates | Iron minerals | Asbestos |
| This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Grunerite". A list of authors is available in Wikipedia. |
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