| 1. | Other polymorphs of calcium carbonate are the minerals aragonite and vaterite.
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| 2. | Cerussite crystallizes in the orthorhombic system and is isomorphous with aragonite.
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| 3. | They are usually made of needle-form calcite and aragonite.
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| 4. | These white calcareous tubes are made of both calcite and aragonite.
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| 5. | The Robertida differ in being composed, instead, of aragonite.
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| 6. | Turtle eggs are very different in structure and are made with aragonite.
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| 7. | The latter contains the largest block of aragonite yet discovered.
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| 8. | The shell is made of calcite with an inner layer of aragonite.
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| 9. | Nearby, the place for the famous Penghu aragonite can be seen.
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| 10. | As a result, aragonite-based organisms live in shallower environments.
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