moss agate



a kind of agate or chalcedony containing brown or black mosslike dendritic markings from various impurities.

Origin of moss agate

First recorded in 1790–1800 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for moss agate

  • There was blood upon that moon, and all the shores were like veins in moss-agate and the sea like oil.

    Over the Rocky Mountains to Alaska|Charles Warren Stoddard
  • His soft eyes hardened and the moss-agate look came into them.

    Fore!|Charles Emmett Van Loan
  • The governing planet of the month is Venus, and the gems are moss-agate and emerald.

British Dictionary definitions for moss agate

moss agate


a variety of chalcedony with dark greenish mossy markings, used as a gemstone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012