"black tin" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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          "name": "Mining",
          "orig": "en:Mining",
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          "kind": "topical",
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          "name": "Tin",
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            "Carbon group elements",
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      ],
      "glosses": [
        "Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand."
      ],
      "id": "en-black_tin-en-noun-m4VIgaXL",
      "links": [
        [
          "mining",
          "mining#Noun"
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        [
          "mineralogy",
          "mineralogy"
        ],
        [
          "cassiterite",
          "cassiterite"
        ],
        [
          "smelt",
          "smelt"
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          "Edward H[enry] Knight",
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        "(mining, mineralogy) Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand."
      ],
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        "uncountable"
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        "business",
        "chemistry",
        "geography",
        "geology",
        "mineralogy",
        "mining",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "black tin"
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  "lang_code": "en",
  "pos": "noun",
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        "en:Minerals",
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      "glosses": [
        "Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand."
      ],
      "links": [
        [
          "mining",
          "mining#Noun"
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        [
          "mineralogy",
          "mineralogy"
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        [
          "cassiterite",
          "cassiterite"
        ],
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          "smelt",
          "smelt"
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        "(mining, mineralogy) Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand."
      ],
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        "uncountable"
      ],
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        "geology",
        "mineralogy",
        "mining",
        "natural-sciences",
        "physical-sciences"
      ]
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  "word": "black tin"
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