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Gypsum.
http://wiki.answers.com/Q/What_mineral_is_nonmetal...
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halite for you smarties.
http://wiki.answers.com/Q/What_mineral_has_a_nonme...
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A non-metallic luster could be dull, vitreous, glassy, adamantine, waxy, greasy, resinous, pearly, or silky.
http://wiki.answers.com/Q/What_are_some_terms_used...
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Halite.
http://wiki.answers.com/Q/Which_of_the_minerals_li...
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