n. [ From Dr. Babbington. ] (Min.) A mineral occurring in triclinic crystals approaching pyroxene in angle, and of a greenish black color. It is a silicate of iron, manganese, and lime. [ 1913 Webster ]
n. (Min.) A granular mineral of a grayish or yellowish color, found in Bolton, Massachusetts. It is a silicate of magnesium, belonging to the chrysolite family. [ 1913 Webster ]
n. [ So named after J. G. Ralston of Norristown, Penn. ] (Min.) A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals. [ 1913 Webster ]
n. [ After Dr. W. H. Wollaston, an English chemist, who died in 1828. ] (Min.) A silicate of lime of a white to gray, red, or yellow color, occurring generally in cleavable masses, rarely in tabular crystals; tabular spar. [ 1913 Webster ]
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