Botryoidal Purple Chalcedony (Grape Agate)

Chalcedony is a microcrystalline form of quartz. Most agates and jaspers are Chalcedony. However in the gemstone trade the term Chalcedony is used to describe translucent stones of a singular color. Often blue to blue-gray, grays, purples, oranges and so on. This specimen is also botryoidal. Hense the name grape agate. The picture of this specimen shows a bunch of light dots. The light dots come from little druzy quartz crystals that cover this specimen.