A polished agate egg from Brazil with soft, earthy banding and an open geode centre lined with warm-toned quartz crystals. Agate builds up in layers as silica-rich fluids fill volcanic cavities; the crystal pocket at its heart formed last, as the final fluids crystallised.
Mineral: Agate (chalcedony, a variety of quartz, SiO₂) Crystal system: Trigonal Origin: Brazil Hardness: 7 on the Mohs scale; durable and easy to handle Treatment: None Dimensions: 5.17 × 5 × 7 cm Weight: 250 g Note: Acrylic stand included
