A vibrant and unique specimen featuring grape-like clusters of agate chalcedony, showcasing a stunning purple-gray color play. This striking mineral formation is prized for its natural beauty and rarity.
Geological Information:
- Location: Indonesia, Southeast Asia - Type: Agate Chalcedony (Cryptocrystalline Quartz, SiO₂) - Formation: Volcanic rocks, specifically in the Indonesian archipelago's volcanic regions - Color: Purple-gray, with vibrant grape-like clusters - Hardness: 6.5-7 on the Mohs scale, characteristic of cryptocrystalline quartz - Crystal System: Hexagonal ( trigonal scalenohedral) - Formation Process: Slow cooling and crystallization of silica-rich fluids in volcanic rocks resulted in the formation of these unique agate chalcedony clusters. - Age: Cenozoic Era, approximately 25-35 million years old - Occurrence: Found in limited quantities, primarily in the Indonesian islands of Java, Sumatra, and Bali.
This detailed description highlights the natural beauty, unique features, and geological significance of Grape Agate Chalcedony from Indonesia, showcasing its rarity and mineralogical importance.
