n. A plagioclase feldspar mineral, calcium sodium aluminum silicate, often very coarsely crystalline, used as a decorative stone for carvings and building façades.
the GNU version of the Collaborative International Dictionary of English
n. A kind of feldspar commonly showing a beautiful play of colors, and hence much used for ornamental purposes. The finest specimens come from Labrador. See feldspar.
The Century Dictionary and Cyclopedia
n. A lime-soda feldspar (see feldspar), one of the species intermediate between the lime feldspar, anorthite, and the soda feldspar, albite, but more closely allied to the former.
Word Usage
"This was Meyer's Minerals, a shop that makes jewelry and other objects from local stones such as labradorite and marble."