Agate [ag-it] noun origin: French 1. a variegated chalcedony showing curved, colored bands or other markings. 2. a playing marble made of this substance, or of a glass in imitation of it. Geological patterns are the rock stars of today's design. As the name suggests, the Agate glass collection is evocative of the semi-precious stone found in volcanic formations. Agate's beautiful banding visually combines the solidarity of stone, the fluidity of water and the translucency of air in 15 variegated colors and two finishes.