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Are pearls a rock?

Amelia Roberts | 2023-06-01 13:05:00 | page views：1541
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William Thompson

Works at Amazon, Lives in Seattle, WA
Pearls are deposits of calcium carbonate (aragonite, calcite, or both) called nacre. Pearl (nacre) is not a mineral because it does not have a distinctive crystal structure and because it is formed by the action of a living organism. ... Because pearls have long been used in jewelry, however, they are considered gemstones.
2023-06-06 13:05:00
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Charlotte Lee

QuesHub.com delivers expert answers and knowledge to you.
Pearls are deposits of calcium carbonate (aragonite, calcite, or both) called nacre. Pearl (nacre) is not a mineral because it does not have a distinctive crystal structure and because it is formed by the action of a living organism. ... Because pearls have long been used in jewelry, however, they are considered gemstones.
Pearl--Kentucky's State Gemstone, Rocks and Minerals, Kentucky ...
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