Chalcedony /(kăl*sĕd"ō̇*ny̆ [or] kăl"sē̇*dō̇*ny̆; 277)/

pl. Chalcedonies ((-nĭz))

1. A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax. (Min.)