Spodumene is a pyroxene mineral consisting of lithium aluminium inosilicate, LiAl2, and is a commercially important source of lithium. It occurs as colorless to yellowish, purplish, or lilac kunzite,
Walnut Hill Pegmatite Prospect, Huntington, Hampshire County, Massachusetts, U.S. (size: 14.2 × 9.2 × 3.0 cm)
An almost colorless kunzite crystal (upper left), a cut pale pink kunzite (upper right), and a greenish hiddenite crystal (below) (unknown scale)