"rockstone" meaning in English

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  "etymology_text": "From rock + stone.",
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      "form": "rockstones",
      "tags": [
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          "ref": "1847, Philip Henry Gosse, Richard Hill, The Birds of Jamaica, page 274:",
          "text": "Without wasting many words, however, the youth picked up a \"rockstone,\" as pebbles are called in Jamaica, and delivered the missile with so skilful an aim, that the bird dropped to the ground, […]",
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          "ref": "1992, Lorna Goodison, “Praise to the mother of Jamaican art”, in Poems:",
          "text": "She learned her art by breaking / hard rockstones.",
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      "glosses": [
        "A pebble."
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        "(Jamaica) A pebble."
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  "word": "rockstone"
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  "etymology_text": "From rock + stone.",
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      "form": "rockstones",
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        "(Jamaica) A pebble."
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  "word": "rockstone"
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