{
  "id": "sphalerite",
  "name": "Sphalerite",
  "chemical_formula": "ZnS",
  "mohs_hardness": 3.75,
  "color": "Yellow, brown, to black",
  "luster": "Resinous to adamantine",
  "url": "https://gratisapi.com/api/minerals/sphalerite"
}