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Definition of Polycrase
1. Noun. (minerology) A black or brown amorphous metallic complex uranium yttrium oxide mineral, found in granitic pegmatites. ¹
¹ Source: wiktionary.com
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1. Noun. (minerology) A black or brown amorphous metallic complex uranium yttrium oxide mineral, found in granitic pegmatites. ¹
¹ Source: wiktionary.com