Arsenopyrites
Arsenopyrites are a group of minerals that belong to the pyrite group and are composed of iron, arsenic, and sulfur. They typically have a silver-white color and metallic luster, with a hardness ranging from 5.5 to 6 on the Mohs scale. Arsenopyrites are commonly found in hydrothermal veins associated with gold and other sulfide minerals. They are known for their distinct prismatic crystal shape and high arsenic content, which can be toxic if ingested or inhaled.