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{%type%} Definitions

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Short "hint"

n. - A mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium.

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Usage examples (31)
  • The Breo Roam sports watch is made from a material known as tourmaline, a naturally occurring mineral widely used as a semi-precious gemstone.
  • Brown tourmaline is sometimes very pleasing in color.
  • Mr. Ruiz asked: "Where is the rock with the tourmaline?"
  • Gem tourmaline comes from Ceylon, from Madagascar, from the
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