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The Collaborative International Dictionary
Tourmaline

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 .]

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.

Douglas Harper's Etymology Dictionary
tourmaline

complete silicate of aluminum and boron, 1759, from French or German, ultimately from Sinhalese toramalli, a general name for cornelian.

Wiktionary
tourmaline

n. A complex black or dark coloured borosilicate mineral.

WordNet
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

Wikipedia
Tourmaline

Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone comes in a wide variety of colors. The name comes from the Tamil and Sinhalese word "Turmali" (තුරමලි) or "Thoramalli" (තෝරමල්ලි), which applied to different gemstones found in Sri Lanka.

Tourmaline (band)

Tourmaline is an American rock band from, New Jersey. Formed in June 2004, the band consists of Matt Rauch ( lead vocals, Ryan Baredes ( guitar), and Max Rauch ( Drums). They have released two albums. Strange Distress Calls was released in the United States a year after the band's formation on June 21. It was recorded shortly after they formed in the span of ten days. Three of the members were 15 years of age. The Swindle was recorded in March of 08 with producer Joe Mcgrath and released in the fall of 08.

Usage examples of "tourmaline".

So did he take fruit of every color, never suspecting that the red ones might be rubies, carbuncles, hyacinths, corals, or camelians, nor the white ones diamonds, pearls, nacre, or moonstones, nor the green ones emeralds, beryls, jade, prase, or aquamarine, not to mention those many varieties of blue, violet, yellow, and various unknown colors and the fact that they might be sapphires, lapis, turquoise, amethysts, jaspers, topaz, amber, agates, opals, hematite, tourmaline, peridot, and chrysoprase.

Before his talk Gentry had fingered citrines, tourmalines, amethysts, topazes, rose and blue quartz, black onyxes, obsidian, and ordinary pebbles rounded by tumbling in Rocky Mountain streams.

In the middle of the breast and stomach circles, obviously meant to represent navel and nipples, were bright red garnets, and a line of colored stones -- green and pink tourmalines, red garnets, aquamarines -- had been fastened along the flat top of the head.

On Earth he would have suspected tsavorite, emerald or chrome tourmaline, in that order.

The floor was inset with tourmaline, amber, amethyst, aventurine, and other semiprecious stones.

The different shades of green in tourmaline, emerald, peridot and demantoid garnet, that wonderful apricot color of imperial topaz.

Dan had taught her how to distinguish the greens of tourmaline and emerald and the rare demantoid garnets, and as a special treat he let her play the game that was not a game at all but a method of distinguishing between topazes and the less valuable citrines of identical color.

They found many fragments and a few cylindrical segments that had been shafts of tourmaline as long and thick as Chance’s finger before the earth had twisted, fracturing and finally shattering the tourmaline’s crystal integrity.

The merchant princes, grown vastly rich off the trade between the seas, were divided into three jealous factions: the Ancient Guild of Spicers, the Tourmaline Brotherhood, and the Thirteen, to which Xaro belonged.

A tunnel dug for thirty-one years had come upon a fabulous vein of amethyst, containing also rose quartz and the strange black crystalline rods of tourmaline.