SG Heritage Dictionary

Tourmalin [\N] Webster's Dictionary 1828

1. TOURMALIN

2. TOURN, noun The sheriff's turn or court; also, a spinning wheel. [Not American.]

Tourmaline [Noun] Webster's Dictionary 1913

A mineral occurring usually in three-sided or six-sided prisms terminated by rhombohedral or scalenohedral planes. Black tourmaline (schorl) is the most common variety, but there are also other varieties, as the blue (indicolite), red (rubellite), also green, brown, and white. The red and green varieties when transparent are valued as jewels.

Tourmaline Encyclopedia Britannica

TOURMALINE. See Electricity, vol. viii. p. 99; Geology, vol. x. p. 228; and Mineralogy, vol, xvi. p. 409.

9th ed. Encyclopædia Britannica, vol. 23, p. 488
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