Amphibole

Definition and stakes

Chambers's Twentieth Century Dictionary…

“ Amphibia, am-fib′i-a, Amphibials, Amphibians, n.pl. animals capable of living both under water and on land.—n. Amphib′ian.—adj. Amphib′ious. [L.—Gr., from amphi, both, bios, life.]
Amphibole, am-fib′ol-ē, n. the name of a group of minerals which are essentially silicates of lime and magnesia, but these bases are often partly replaced by alumina, and oxides of iron and manganese—tremolite, nephrite (jade) , and hornblende.
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Source: Gutenberg

Leonard James Spencer,  1911 Encyclopædia Britannica, Volume 18… (1911)

“ In gneisses and crystalline schists, quartz, felspar, mica, talc, amphibole, &c. are important constituents.
Minerals of Sedimentary Rocks.—By the weathering and disintegration of igneous and metamorphic rocks the various minerals set free and the products of decomposition of others supply the material of sedimentary rocks; thus sandstones consist largely of quartz, shales of kaolin and other clay minerals. Those minerals (e.g. gem-stones and gold) which resist the action of weathering processes are found as water-worn pebbles and grains in detrital deposits.
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Source: Wikisource

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