tourmaline
pronunciation
How to pronounce tourmaline in British English:
UK ['tʊməlɪn]
How to pronounce tourmaline in American English:
US ['tʊrməlɪn]
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- Noun:
- 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
Word Origin
- tourmaline (n.)
- complete silicate of aluminum and boron, 1759, from French or German, ultimately from Sinhalese toramalli, a general name for cornelian.
Example
- 1. No , but the bedrock schist beneath them is studded with opal , beryl , chrysoberyl , garnet , and three kinds of tourmaline .
- 2. At the same time there are tourmaline bra breast , breast , breast enhancement and protection of the role of the heart .
- 3. The winery currently sources grapes from several napa valley vineyards , including sugarloaf mountain vineyard , tourmaline vineyard and broken rock vineyard .
- 4. An egyptian legend explains that tourmalines come in so many different colors because they passed through a rainbow on the journey from the earth 's center , but scientists know that a tourmaline 's chemical composition determines its color .
- 5. The powder of tourmaline could absorb formaldehyde and destroyed it with the surface electric field , which was studied by infrared ray diffuse reflection of ftir .