Word Meanings - TOURMALINE - Book Publishers vocabulary database

A mineral occurring usually in three-sided or six-sided prisms terminated by rhombohedral or scalenohedral planes. Black tourmaline is the most common variety, but there are also other varieties, as the blue , red , also green, brown, and white.

Additional info about word: TOURMALINE

A mineral occurring usually in three-sided or six-sided prisms terminated by rhombohedral or scalenohedral planes. Black tourmaline is the most common variety, but there are also other varieties, as the blue , red , also green, brown, and white. The red and green varieties when transparent are valued as jewels. Note: Crystals of tourmaline when heated exhibit electric polarity . Tourmaline is also used in the form of a polariscope called tourmaline tongs. (more info) NL. turmalina, turmalinus; all fr. tournamal, a name given to this

Related words: (words related to TOURMALINE)

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