Agate egg (B) — Brazilian, with quartz geode

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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 volc anic cavities; the crystal pocket at its heart formed last, as the final fluids crystallised. Mineral: Agate (chalcedony, a variety of quartz, SiO₂)Crystal system: TrigonalOrigin: BrazilHardness: 7 on the Mohs scale; durable and easy to handleTreatment: NoneDimensions: 5.17 × 5 × 7 cmWeight: 250 gNote: Acrylic stand included You'll receive the exact piece photographed. Show more