Beautiful Grape Amethyst cluster (also known as Botryoidal Chalcedony), featuring natural rounded formations resembling a cluster of grapes. The surface displays a soft lavender to violet hue with a delicate sparkle typical of high-quality specimens from Sulawesi, Indonesia. This formation occurs when silica-rich fluids slowly crystallise in volcanic rock cavities, forming spherical, “bubble-like” crystal groups — a rare geological process that creates this organic, berry-like appearance. Mounted on a decorative black metal stand, this piece serves as both a collector’s mineral specimen and a natural art object. Details: Mineral: Grape Amethyst (Botryoidal Chalcedony) Chemical composition: SiO₂ (Quartz family) Origin: Sulawesi, Indonesia Period: Cenozoic (approx. 20–25 million years old) Colour: Lavender to light purple Dimensions (with stand): approx. 15 × 8 × 6 cm Weight: approx. 400 g Condition: Excellent – natural specimen, stable mount, no repairs A striking and elegant example of nature’s artistry — ideal for display or as part of a mineral collection. Carefully packed and shipped with tracking.