( n. )
Chalcedony in parallel layers of different shades of color. It is used for making cameos, the figure being cut in one layer with the next as a ground.
( n. )
Chalcedony in parallel layers of different shades of color. It is used for making cameos, the figure being cut in one layer with the next as a ground.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012