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tourmaline ['tʊəməliːn, 'tʊrm-] n
earth.sc. tourmaline f
 English thesaurus
tourmaline ['tʊəməliːn, 'tʊrm-] n
jewl. A complex crystalline silicate containing aluminum, boron, and other elements.
tourmaline: 4 phrases in 3 subjects
Earth sciences1
Metallurgy2
Ornithology1

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