Beautiful grape agate specimen, the one shown is the one you will receive. Grape Agate is the name given to tiny quartz crystals with a spherical habit, and the lovely grape like color they display. The name grape agate is a popular marketing name this item goes by, but the more correct description would be botryoidal amethyst.
Botryoidal Amethyst (grape agate) measures 4 1/2" wide