This LoRA recreates the appearance of something that has been carved from pyrite (fool's gold). Pyrite has the chemical formula FeS2 (iron [II] disulfide). If you heat it up, all of the sulfur will eventually escape and the iron will react with oxygen in the air, so that all you're left with is iron oxide (rust). So the only way to make something out of pyrite is to carve it. Things carved with pyrite have unique cracks and imperfections in them, including spots where pyrite crystals are still visible.
This LoRA works well with realistic SD 1.5 models. It can be used with semi-realistic and animé models, but will be more temperamental.