blue tourmaline

  • 1Tourmaline — Schorl Tourmaline General Category Cyclosilicate Chemical formula (Ca,K,Na,[ …

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  • 2Tourmaline — 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… …

    The Collaborative International Dictionary of English

  • 3tourmaline — tourmalinic /toor meuh lin ik/, adj. /toor meuh lin, leen /, n. any of a group of silicate minerals of complex composition, containing boron, aluminum, etc., usually black but having various colored, transparent varieties used as gems. Also,… …

    Universalium

  • 4tourmaline — /ˈtɔməlin/ (say tawmuhleen) noun a mineral, essentially a complex silicate containing boron, aluminium, sodium, lithium, magnesium and iron, occurring in various colours (black being common); the transparent varieties (red, pink, green and blue)… …

  • 5tourmaline —   n. kind of black, blue, red and green silicate cut as gem …

    Dictionary of difficult words

  • 6paraiba tourmaline — noun A bright, gemstone with blue to green tones …

    Wiktionary

  • 7Brazilian sapphire — blue tourmaline …

    Eponyms, nicknames, and geographical games

  • 8indicolite — n. (Min.) Indigolite, blue tourmaline, blue shorl …

    New dictionary of synonyms

  • 9indigolite — n. (Min.) Indicolite, blue tourmaline, blue shorl …

    New dictionary of synonyms

  • 10Quartz-porphyry — Quartz porphyry, in petrology, is the name given to a group of hemi crystalline acid rocks containing porphyritic crystals of quartz in a fine grained matrix, usually of micro crystalline or felsitic structure. In specimens, the quartz appears as …

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