G2A1D2O1L1I1N1I1T1E1
12 points
GADOLINITE is validvalid
a mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron
a mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron