Chalcopyrite Watering Stones

Pronounced kal-ko-PYE-rite, this mineral is the most abundant copper ore on earth. Its bronzy-gold, purple-blue iridescent beauty belies its value to plant life—iron is essential for healthy cellular function and chalcopyrite’s high sulfur content keeps soils lightly acidified, preventing iron chlorosis (yellowing leaves). Copper is an important trace element as well as a fungicide.