Pyrite

Sample of cubic euhedral Pyrite that is brass-yellow . Visible parallel striations along the crystal faces. Largest crystal has a diameter of 1.5 cm. Pyrite (FeS2) can be pale yellow or brass-yellow and is often tarnished with black or brown film. Lustre is usually metallic but can also be iridescent and streak is greenish-black. Hardness is 6 to 6 1/2. Pyrite usually occurs as cubes or pyritohedrons with parallel striations along the crystal faces. Pyrite can also occur as octahedrons, nodules, massive forms, fine to coarse-grain, fibrous, mammillary or stalactitic. The sample comes from Groundhog Mine is a Copper-Lead Mine. Copper and Lead are the main commodities, but secondary ones are Gold and Silver. The mine is a Zn-Pb-Cu-Ag Skarn deposit. This deposit formed in limestone that has been dated to the Carboniferous time period. https://www.mindat.org/loc-7078.html