Botryoidal amethyst

Dimensions: 4.3 x 2.5cm
 Location: Mamuju area (Manakarra), West Sulawesi Province, Indonesia
 Microcrystallization of amethyst in Botryoidal form. Typical crystallizations of this deposit, locally called "Grape Agate" or Chalcedony.
 The mineral is not glued to the base (soft putty).