A statement orange calcite tower, cut and polished from a single piece.
Calcite is the mineral the hardness scale uses to define its own third step. When Mohs built the scale in 1812 he needed a reference for each level, and calcite is the one he picked for 3, which means every description of a stone as harder or softer than 3 is measured against this material. A copper coin will mark it. So will a steel key, a ceramic tile and most other minerals you own.
Mineral: Calcite (calcium carbonate, CaCO₃)
Crystal system: Trigonal
Origin: Mexico
Hardness: 3 on the Mohs scale; soft, and scratched by most things harder than a fingernail
Treatment: None
Dimensions: 6.45 x 6.45 x 21 cm
Weight: 2.105 kg
Note: Calcite is soft at 3 on the Mohs scale and reacts to acid, so keep household cleaners away from it. Vinegar, lemon juice and most limescale removers will etch the polish. Dust it dry
You will receive the exact piece photographed.