noun. A silicate of cerium and allied metals with aluminium, iron, and calcium. It is isomorphous with epidote.

noun. A silicate containing a large amount of cerium. It is usually black in color, opaque, and is related to epidote in form and composition.

noun. Any of a group of silicate minerals that are a source of rare earth metals.

"-- This is an emerald-green variety of spodumene, found only in Alexander county, when it occurs sparsely in the soil and gneissoid rock, along with emerald, monazite, rutile, allanite, dolomite and quartz crystals of generally smoky color and rare modifications."