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Amphibolite
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Amphibolite is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense,
An amphibolite boulder in the Botanical Gardens of Charles University, Prague, Czech Republic.
An amphibolite boulder in the Botanical Gardens of Charles University, Prague, Czech Republic.
Amphibolite from Cape Cod, Massachusetts
Amphibolite from Cape Cod, Massachusetts
Garnet bearing amphibolite from Val di Fleres, Italy
Garnet bearing amphibolite from Val di Fleres, Italy
Garnet amphibolite, sold as "Nordic Sunset Granite", reportedly from Murmansk area
Garnet amphibolite, sold as "Nordic Sunset Granite", reportedly from Murmansk area
Amphibole
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Amphibole is a group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnes
Amphibole (tremolite)
Amphibole (tremolite)
Photomicrographs of a thin section containing an amphibole crystal; under cross-polarized light on the left, and plane-polarized light on the right.
Photomicrographs of a thin section containing an amphibole crystal; under cross-polarized light on the left, and plane-polarized light on the right.
Double-chain inosilicate structure looking up the [100] axis. Silicon ions are hidden by apical oxygen ions.
Double-chain inosilicate structure looking up the [100] axis. Silicon ions are hidden by apical oxygen ions.
Side view (along [010]) of double chain inosilicate backbone. Apical oxygens are at the bottom.
Side view (along [010]) of double chain inosilicate backbone. Apical oxygens are at the bottom.