{
  "mode": "geological-research",
  "access": "unverified",
  "total": 14933,
  "retrievedOn": "2026-09-05",
  "sourceTitle": "U.S. Geological Survey — Mineral Resources Data System (MRDS)",
  "sourceUrl": "https://energy.usgs.gov/arcgis/rest/services/MRData/Mineral_Resource_Data_System/FeatureServer/3",
  "licenseUrl": "https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits",
  "metadataUrl": "https://energy.usgs.gov/arcgis/rest/services/Hosted/Mineral_Resource_Data_System/FeatureServer/0/metadata?f=xml",
  "notice": "Historical mineral occurrences, prospects and mine records—not collecting destinations or permission. Systematic MRDS updates ceased in 2011, with limited later revisions. Current ownership, access, operation and coordinate accuracy are unverified. Never enter mines or shafts or trespass; confirm conditions with the land manager.",
  "selection": {
    "description": "Gemstone, quartz, silica, garnet, corundum, feldspar, mica, beryllium, fluorite and staurolite commodity records, using original USGS labels. Includes industrial mineral records; not all are gem-quality specimens.",
    "where": "(code_list LIKE 'GEM\\_%' ESCAPE '\\' OR code_list LIKE '% GEM\\_%' ESCAPE '\\' OR (code_list = 'GEM' OR code_list LIKE 'GEM %' ESCAPE '\\' OR code_list LIKE '% GEM' ESCAPE '\\' OR code_list LIKE '% GEM %' ESCAPE '\\') OR (code_list = 'QTZ' OR code_list LIKE 'QTZ %' ESCAPE '\\' OR code_list LIKE '% QTZ' ESCAPE '\\' OR code_list LIKE '% QTZ %' ESCAPE '\\') OR (code_list = 'SIL' OR code_list LIKE 'SIL %' ESCAPE '\\' OR code_list LIKE '% SIL' ESCAPE '\\' OR code_list LIKE '% SIL %' ESCAPE '\\') OR (code_list = 'ABR_G' OR code_list LIKE 'ABR\\_G %' ESCAPE '\\' OR code_list LIKE '% ABR\\_G' ESCAPE '\\' OR code_list LIKE '% ABR\\_G %' ESCAPE '\\') OR (code_list = 'ABR_C' OR code_list LIKE 'ABR\\_C %' ESCAPE '\\' OR code_list LIKE '% ABR\\_C' ESCAPE '\\' OR code_list LIKE '% ABR\\_C %' ESCAPE '\\') OR (code_list = 'FLD' OR code_list LIKE 'FLD %' ESCAPE '\\' OR code_list LIKE '% FLD' ESCAPE '\\' OR code_list LIKE '% FLD %' ESCAPE '\\') OR (code_list = 'MIC' OR code_list LIKE 'MIC %' ESCAPE '\\' OR code_list LIKE '% MIC' ESCAPE '\\' OR code_list LIKE '% MIC %' ESCAPE '\\') OR (code_list = 'BE' OR code_list LIKE 'BE %' ESCAPE '\\' OR code_list LIKE '% BE' ESCAPE '\\' OR code_list LIKE '% BE %' ESCAPE '\\') OR (code_list = 'F' OR code_list LIKE 'F %' ESCAPE '\\' OR code_list LIKE '% F' ESCAPE '\\' OR code_list LIKE '% F %' ESCAPE '\\') OR (code_list = 'STA' OR code_list LIKE 'STA %' ESCAPE '\\' OR code_list LIKE '% STA' ESCAPE '\\' OR code_list LIKE '% STA %' ESCAPE '\\')) AND NOT ((code_list = 'ASB' OR code_list LIKE 'ASB %' ESCAPE '\\' OR code_list LIKE '% ASB' ESCAPE '\\' OR code_list LIKE '% ASB %' ESCAPE '\\') OR (code_list = 'U' OR code_list LIKE 'U %' ESCAPE '\\' OR code_list LIKE '% U' ESCAPE '\\' OR code_list LIKE '% U %' ESCAPE '\\') OR (code_list = 'TH' OR code_list LIKE 'TH %' ESCAPE '\\' OR code_list LIKE '% TH' ESCAPE '\\' OR code_list LIKE '% TH %' ESCAPE '\\') OR (code_list = 'HG' OR code_list LIKE 'HG %' ESCAPE '\\' OR code_list LIKE '% HG' ESCAPE '\\' OR code_list LIKE '% HG %' ESCAPE '\\') OR (code_list = 'AS' OR code_list LIKE 'AS %' ESCAPE '\\' OR code_list LIKE '% AS' ESCAPE '\\' OR code_list LIKE '% AS %' ESCAPE '\\'))",
    "excludedCodes": [
      "ASB",
      "U",
      "TH",
      "HG",
      "AS"
    ],
    "sourceMatches": 15054,
    "imported": 14933,
    "dropped": {
      "excludedNamedMaterial": 43,
      "missingOrInvalidWgs84": 5,
      "processingPlant": 73
    },
    "duplicatePolicy": "Unique MRDS source IDs. Multiple historical records can refer to one physical site; counts are records, not verified unique collecting places.",
    "coordinates": "Original GeoJSON Point geometry in WGS84. No geocoding or guessed coordinates. Country and region as recorded; missing regions explicitly labelled.",
    "safety": "Known excluded commodity codes and some named hazardous materials are omitted. Remaining records are NOT certified safe."
  },
  "stats": {
    "total": 14933,
    "countries": 85,
    "regions": 323,
    "materials": 454
  }
}