A statement amethyst cluster from Brazil, its deep violet points broken by a striking natural calcite inclusion. Amethyst forms when silica-rich fluids crystallise slowly in volcanic cavities, the purple colour produced by trace iron and natural irradiation; here, a secondary pocket of calcite has grown within the same formation, a genuine one-of-a-kind pairing. Mounted on a rotating black metal stand for display from every angle.
Mineral: Amethyst (quartz, SiO₂) with calcite (calcium carbonate, CaCO₃)
Crystal system: Trigonal (amethyst); trigonal (calcite)
Origin: Brazil
Hardness: Amethyst 7 on the Mohs scale; calcite 3, softer and more easily marked
Treatment: None
Dimensions: 20 × 20 × 28.5 cm (including stand)
Weight: 7.21 kg (including stand)
You'll receive the exact piece photographed.