amphibole

1. n. A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syenite, diorite, most varieties of trachyte, etc. See Hornblende. Source: opted

2. n. a mineral or mineral variety belonging to the amphibole group Source: wordnet

3. A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syenite, diorite, most varieties of trachyte, etc. See Hornblende. Source: webster

4. A common mineral embracing many varieties varying in color andin composition. It occurs in monoclinic crystals; also massive,generally with fibrous or columnar structure. The color varies fromwhite to gray, green, brown, and black. It is a silicate of magnesiumand calcium, with usually aluminium and iron. Some common varietiesare tremolite, actinolite, asbestus, edenite, hornblende (the lastname being also used as a general term for the whole species).Amphibole is a constituent of many crystalline rocks, as syenite,diorite, most varieties of trachyte, etc. See Hornblende. Source: adambom

5. n. a mineral or mineral variety belonging to the amphibole group Source: ecdict

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