Dubai Pearl Diamond New Fashion Gold Jewellery Locket Set And Ring.
By Aamir Mannan Shiakh.
Typically, the build-up of a natural pearl consists of a brown central zone formed by columnar calcium carbonate (usually calcite, sometimes columnar aragonite) and a yellowish to white outer zone consisting of nacre (tabular aragonite). In a pearl cross-section such as the diagram, these two different materials can be seen.
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