cumberlandite


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cumberlandite

[′kəm·bər·lən‚dīt]
(petrology)
A coarse-grained, ultramafic, ultrabasic rock composed principally of olivine crystals in a ground mass of magnetite and ilmenite with minor plagioclase.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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7: The iron-bearing mineral Cumberlandite is the official rock of which small US state?
7 The unique iron-bearing mineral Cumberlandite is the official rock of which small US state (logically, since its only known deposit is found there)?

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