"Bologna stone" meaning in English

{
  "etymology_text": "Specimens were found near Bologna in the 17th century by Vincenzo Casciarolo.",
  "forms": [
    {
      "form": "Bologna stones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Bologna stone (plural Bologna stones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Alchemy",
          "orig": "en:Alchemy",
          "parents": [
            "Forteana",
            "Pseudoscience",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2013, Marco Piccolino, Galileo's Visions: Piercing the spheres of the heavens by eye and mind",
          "text": "It was concerned with the causes of the phosphorescence of the so-called 'Bologna stone' (a mineral named by the author of the book with the more imposing term of litheosphorus).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The phosphorescent form of baryte."
      ],
      "id": "en-Bologna_stone-en-noun-L9h84xMC",
      "links": [
        [
          "alchemy",
          "alchemy"
        ],
        [
          "phosphorescent",
          "phosphorescent"
        ],
        [
          "baryte",
          "baryte"
        ]
      ],
      "raw_glosses": [
        "(alchemy) The phosphorescent form of baryte."
      ],
      "synonyms": [
        {
          "word": "Bolognian stone"
        }
      ],
      "topics": [
        "alchemy",
        "pseudoscience"
      ]
    }
  ],
  "word": "Bologna stone"
}

{
  "etymology_text": "Specimens were found near Bologna in the 17th century by Vincenzo Casciarolo.",
  "forms": [
    {
      "form": "Bologna stones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Bologna stone (plural Bologna stones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Alchemy"
      ],
      "examples": [
        {
          "ref": "2013, Marco Piccolino, Galileo's Visions: Piercing the spheres of the heavens by eye and mind",
          "text": "It was concerned with the causes of the phosphorescence of the so-called 'Bologna stone' (a mineral named by the author of the book with the more imposing term of litheosphorus).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The phosphorescent form of baryte."
      ],
      "links": [
        [
          "alchemy",
          "alchemy"
        ],
        [
          "phosphorescent",
          "phosphorescent"
        ],
        [
          "baryte",
          "baryte"
        ]
      ],
      "raw_glosses": [
        "(alchemy) The phosphorescent form of baryte."
      ],
      "topics": [
        "alchemy",
        "pseudoscience"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Bolognian stone"
    }
  ],
  "word": "Bologna stone"
}