Sphalerite and calcite, Trepca, Kosovo

Sphalerite ( Zinc blende ) + calcite , Trepca, Kosovo Minerals and crystals should be handled with care. Despite being stone, they can be soft, brittle, change color in bright light or heat, react to drying out or weather in humidity. You should always wash your hands after handling stone, especially before eating. Dust and fibers may be released from the stone during handling and should not be inhaled. We do not recommend ingestion e.g. through a water bath. Like flake salt (crystalline NaCl), minerals can be soluble in liquids and some substances can be directly harmful.