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tourmaline 音标拼音: [t'ʊrməl,in]

n. 电石

电石

WordNet (r) 3.0 (2006) (WordNet)

tourmaline
n 1: 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

The Collaborative International Dictionary of English v.0.48 (gcide)

Tourmaline \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} .]
[1913 Webster]

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.
[1913 Webster]

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英文字典中文字典相关资料:

Tourmaline: Meanings, Properties and Powers - The Complete Guide
Tourmaline will build your inner strength and unite your heart, mind, and spirit in love and passion It’s the stone that will bring you joy, satisfaction, commitment, and emotional stability Tourmaline is an excellent stone to energize and balance your chakras It’s also a must-have stone if you’re serious about cleansing your aura!
What Is Tourmaline Gemstone | Tourmaline Stone – GIA
Tourmaline’s colors have many different causes It’s generally agreed that traces of iron, and possibly titanium, induce green and blue colors Manganese produces reds and pinks, and possibly yellows Some pink and yellow tourmalines might owe their hues to color centers caused by radiation, which can be natural or laboratory-induced

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