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polymineralic
polymineralic adj.
Brit. 
/ˌpɒlɪmɪnəˈralɪk/
, /ˌpɒlɪmɪnəˈralɪk/U.S. /ˌpɑliˌmɪnəˈrælɪk/
Geology composed of or containing more than one mineral./ˌpɑliˌmɪnəˈrælɪk/ΚΠ
1960 Prof. Papers U.S. Geol. Surv. b458/2 Unimineralic beds of anhydrite or gypsum..are common; polymineralic beds are rarer.
1999 Amer. Antiq. 64 77/1 They [sc. luminescence tests] can be applied to either monomineralic samples (quartz or feldspar grains) or polymineralic samples (mixture of quartz and feldspar).
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