About The Word Tourmaline
Learn about the word Tourmaline to help solve your crossword puzzle. Discover Tourmaline definitions and meaning, origins, synonyms, related terms and more at the free Crossword Dictionary.
Tourmaline
| Tourmaline Definition And Meaning |
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What's The Definition Of Tourmaline?
[n] a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones
Synonyms | Synonyms for Tourmaline: Related Terms | Find terms related to Tourmaline: See Also | mineral | transparent gem Tourmaline In Webster's Dictionary \Tour"ma*line\, n. [F. tourmaline, cf. It. turmalina,
tormalina, NL. turmalina, turmalinus; all fr. tournamal, a
name given to this stone in Ceylon.] (Min.)
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. [Written
also {turmaline} .]
Note: Crystals of tourmaline when heated exhibit electric
polarity (see {Pyroelectric}, n.). Tourmaline is also
used in the form of a polariscope called tourmaline
tongs.
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