A fibrous blue or green mineral consisting of a silicate of iron and sodium
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crocidoliteA fibrous blue or green mineral consisting of a silicate of iron and sodium
crocidolitea fibrous mineral consisting mainly of silicate of iron and sodium, called blue asbestos
crocidolitesCROCIDOLITE, a fibrous mineral consisting mainly of silicate of iron and sodium, called blue asbestos
hornblendesA dark brown, black, or green mineral of the amphibole group consisting of a hydroxyl alumino-silicate of calcium, magnesium, and iron, occurring in many igneous and metamorphic rocks
beryla mineral consisting of a silicate of beryllium and aluminum of great hardness that occurs in colorless hexagonal prisms when pure and in various colors (as green, blue, yellow, or pink) when not pure, that is valued as a source of gems, and that is the principal source of beryllium
iolitestrongly dichroic blue mineral consisting of a silicate of magnesium, aluminum, and iron: common in metamorphic rocks
cordieritesstrongly dichroic blue mineral consisting of a silicate of magnesium, aluminum, and iron: common in metamorphic rocks
iolitesstrongly dichroic blue mineral consisting of a silicate of magnesium, aluminum, and iron: common in metamorphic rocks