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.
Amphibolite from Cape Cod, Massachusetts
Garnet bearing amphibolite from Val di Fleres, Italy
Garnet amphibolite, sold as "Nordic Sunset Granite", reportedly from Murmansk area
Greenschist
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Greenschists are metamorphic rocks that formed under the lowest temperatures and pressures usually produced by regional metamorphism, typically 300–450 °C and 2–10 kilobars. Greenschists commonly have
Amphibolite
…and not a retrograde metamorphic product. For instance, actinolite amphibole is a common product of retrograde metamorphism of metabasalt at (upper) greenschist facies conditions. Often, this will take on the crystal form and habit of the original protolith assemblage; actinolite pseudomorphically replacing…
Chlorite schist, a type of greenschist
Greenschist (prasinite) at Cap Corse in Corsica, France
Greenschist (epidote) from Itogon, Benguet, Philippines
Prasinite variety of greenschist (Mont-Cenis massif, French Alps)