Mamuju, Sulawesi Barat Prov., Sulawesi, Indonesia
16.5 cm tall x 20.3 cm wide
Chalcedony is a misnomer for these specimens from Indonesia. They are actually round balls of microscopic terminated amethyst crystals. The additional greenish blue color comes from inclusions of celadonite. The very finest from this locality has a sugary sparkling luster that is unmatched.