Gadolinite
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A mineral of a nearly black color and vitreous luster, andconsisting principally of the silicates of yttrium, cerium, and iron.
Gadolinite meaning & definition 1 of Gadolinite.
A mineral of a nearly black color and vitreous luster, andconsisting principally of the silicates of yttrium, cerium, and iron.