An opaque or semitranslucent brown glass flecked with small metallic particles, often of copper or chromic oxide.
Any of several varieties of quartz or feldspar flecked with particles of mica, hematite, or other materials. Also called sunstone.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.