Purple grape-agate from Sulawesi 8.2Kg

Only available since 2015, by agreement of Indonesian government, this strange purple stone looking like grape, is a Chalcedony from Sulawesi islands. It's shape is called Botryoidal and they are floaters rock: Not attached to a matrix, but found in a blue/green clay, up in the hills under the Sulawesi forrest. This mix of color and perfect round shape is unique! formed by the decay of components of the original lava of a Miocene period volcano, 20 million years ago. This piece is very large for a Botryoid Chalcedony and it has grains of very nice size. This agate-grape goes from green to intense purple: an incredible natural sculpture..