"black sand" meaning in English

{
  "forms": [
    {
      "form": "black sands",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "black sand (countable and uncountable, plural black sands)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Tourism",
          "orig": "en:Tourism",
          "parents": [
            "Travel",
            "Human activity",
            "Transport",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "50 45 4",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Basaltic sand of volcanic origin, frequently found associated with volcanic islands."
      ],
      "id": "en-black_sand-en-noun-tj6g1a8e",
      "links": [
        [
          "tourism",
          "tourism"
        ]
      ],
      "raw_glosses": [
        "(tourism) Basaltic sand of volcanic origin, frequently found associated with volcanic islands."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "lifestyle",
        "tourism",
        "transport"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mining",
          "orig": "en:Mining",
          "parents": [
            "Industries",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "50 45 4",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Sand high in magnetite and other iron-rich ferrous minerals, frequently found associated with placer mining."
      ],
      "id": "en-black_sand-en-noun-7wnwlIY7",
      "links": [
        [
          "mining",
          "mining#Noun"
        ]
      ],
      "raw_glosses": [
        "(mining) Sand high in magnetite and other iron-rich ferrous minerals, frequently found associated with placer mining."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "business",
        "mining"
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see black, sand."
      ],
      "id": "en-black_sand-en-noun-16R55vlI",
      "links": [
        [
          "black",
          "black#English"
        ],
        [
          "sand",
          "sand#English"
        ]
      ],
      "related": [
        {
          "_dis1": "27 27 46",
          "word": "brown sand"
        },
        {
          "_dis1": "27 27 46",
          "word": "white sand"
        },
        {
          "_dis1": "27 27 46",
          "word": "yellow sand"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "wikipedia": [
    "en:black sand"
  ],
  "word": "black sand"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English uncountable nouns"
  ],
  "forms": [
    {
      "form": "black sands",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "black sand (countable and uncountable, plural black sands)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "brown sand"
    },
    {
      "word": "white sand"
    },
    {
      "word": "yellow sand"
    }
  ],
  "senses": [
    {
      "categories": [
        "en:Tourism"
      ],
      "glosses": [
        "Basaltic sand of volcanic origin, frequently found associated with volcanic islands."
      ],
      "links": [
        [
          "tourism",
          "tourism"
        ]
      ],
      "raw_glosses": [
        "(tourism) Basaltic sand of volcanic origin, frequently found associated with volcanic islands."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "lifestyle",
        "tourism",
        "transport"
      ]
    },
    {
      "categories": [
        "en:Mining"
      ],
      "glosses": [
        "Sand high in magnetite and other iron-rich ferrous minerals, frequently found associated with placer mining."
      ],
      "links": [
        [
          "mining",
          "mining#Noun"
        ]
      ],
      "raw_glosses": [
        "(mining) Sand high in magnetite and other iron-rich ferrous minerals, frequently found associated with placer mining."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "business",
        "mining"
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see black, sand."
      ],
      "links": [
        [
          "black",
          "black#English"
        ],
        [
          "sand",
          "sand#English"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "wikipedia": [
    "en:black sand"
  ],
  "word": "black sand"
}