{
  "id": "chalcopyrite",
  "name": "Chalcopyrite",
  "chemical_formula": "CuFeS2",
  "mohs_hardness": 3.75,
  "color": "Brass to golden yellow",
  "luster": "Metallic",
  "url": "https://gratisapi.com/api/minerals/chalcopyrite"
}