Grape agate - Chalcedony, a special botryoidal variety of Chalcedony. In a scientific sense, it's not agate. Specimens are mostly amethyst, purple. There are also green varieties and also colorless.
Specimens are used in jewelry. An interesting collector's variety.
Grape agate - Chalcedony, a special botryoidal variety of Chalcedony. In a scientific sense, it's not agate. Specimens are mostly amethyst, purple. There are also green varieties and also colorless.
Specimens are used in jewelry. An interesting collector's variety.
