Tisbury Starstone Freeform Cabochon | 4.2cm | UK Stellar Beam Calcite It forms in the oxidation

It forms in the oxidation zones of copper deposits and is closely associated with other copper minerals such as malachite

and personal direction

Hollandite is a fascinating and rare manganese oxide mineral

Safe to water cleanse: Not recommended

making it a ready-to-display centerpiece

Tisbury Starstone Freeform Cabochon | 4.2cm | UK Stellar Beam Calcite It forms in the oxidationTisbury Starstone Freeform Cabochon 4. 2cm UK A particularly interesting Tisbury Starstone cabochon from Wiltshire, UK, and one that rewards close looking. The shape is a tapering rectangle one edge wider than the other and the piece has been carved at a slight angle through the coral structure, which means the surface reveals both the classic circular star patterns and the fine feathering effect of the coral's radiating internal structure