Low-lying island with an internal lagoon which rarely exceeds eighty metres in depth, surrounded by a coral ring.
Mother of Pearl :
Name usually used to designate the pearl oysters whose shell was used in the past to make buttons (amongst other thing).
Lustre :
Shine of the pearl due to light reflection on its polished surface.
Orient :
Pearl own radiation generated by the diffraction of light due to the aragonite crystals inside of it.
It’s the combination of lustre and orient that gives the Tahitian cultured pearl its unique aspect .
