- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for moss agate
The governing planet of the month is Venus, and the gems are moss-agate and emerald.
His soft eyes hardened and the moss-agate look came into them.Fore!
Charles Emmett Van Loan
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
- a variety of chalcedony with dark greenish mossy markings, used as a gemstone