Knockstone

{
  "id": "MLC-T-IND-003208",
  "term": "Knockstone",
  "field": "Industrial and trades",
  "definition": "A hard, durable stone used in early ore crushing or grinding operations, often as part of a stamp mill or similar device. These stones were selected for their resistance to wear and their ability to effectively break down mineral-bearing rock. The term is historical, referring to methods predating modern mechanical crushers.",
  "subject": "Mining and extraction",
  "translations": {
    "de": "Klopfstein",
    "es": "piedra de machacar",
    "fr": "dalle de concassage"
  },
  "url": "https://mlchart.com/terminology/industrial/knockstone/"
}