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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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Tourmaline - Wikipedia
Tourmaline ( ˈtʊərməlɪn, - ˌliːn ⓘ TOOR-mə-lin, -⁠leen) is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium This gemstone comes in a wide variety of colors
What Is Tourmaline Gemstone | Tourmaline Stone – GIA
Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem species, occurring in various shades of virtually every hue
The 15 Different Types Of Tourmaline (With Photos) - Rock Chasing
Are you curious about the different types of tourmaline? Read on as we discuss the unique properties and characteristics of these tourmaline types
Tourmaline: Earths most colorful mineral and gemstone
What is Tourmaline? Tourmaline is the name of a large group of boron silicate minerals These minerals share a common crystal structure and similar physical properties - but vary tremendously in chemical composition
Tourmaline Gem, Price, and Jewelry Information - IGS
Everything you ever wanted to know about tourmaline Find value guidelines, scientific data, expert comments, and more in our Gem Listings
Tourmalines Meaning, Healing Properties, and Uses
Tourmaline is a versatile gemstone with a wide range of colors It promotes enlightenment, balance, and removes blockages Tourmaline aids in detoxification, health, and healing It enhances love, compassion, and tolerance Tourmaline has powerful protective properties against negative energies
What is Tourmaline? | Natural History Museum of Utah
Tourmaline is a favorite of mineral collectors, gemstone collectors, and anyone who loves colorful semiprecious gemstone jewelry It is often found in transparent crystals that have bright colors and are large enough for display, for faceting into gemstones, and even for carving
What Is a Tourmaline Gemstone? - giacoloredstones. com
Discover everything about tourmaline gemstones, including their meaning, types, colors, and healing properties Learn why this versatile gemstone is a favorite among jewelers and collectors worldwide
Tourmaline: Meaning, Properties, and Uses - Wisdom Of The Spirit
In this guide, we’ll explore the meaning behind tourmaline, its unique properties, and how you can use it in your daily life What Is Tourmaline? Tourmaline is a semi-precious gemstone that belongs to a group of boron silicate minerals
Tourmaline: Types and Their Differences » Geology Science
Tourmaline is a complex silicate mineral group known for its remarkable variety of colors and its wide range of applications It is comprised of several minerals that share a common crystal structure but differ in their chemical composition

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