Pearl is composed of
[A] Calcium apatite
[B] Calcium silicate
[C] Calcium carbonate
[D] Calcium hydroxyapatite
Pearl
- Pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as a conulariid.
- Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite)
Aragonite
- Aragonite is a carbonate mineral
- One of the three most common naturally occurring crystal forms of calcium carbonate
- CaCO3 – CALCIUM carbonate can exist in three polymorphic forms, which in the order of their usual stabilities are calcite, aragonite and vaterite.
