From the mussel known as the Pinctada Margaritifera Oyster that generates a natural dark color pearl, known as a the Black Pearl of Tahití, doing reference to it's first findings. These pearls were commercialized only in big sizes, destining the production of smaller sizes to the reintegration inside the oyster for the generation of other greater one, or it's elimination.

On the other hand, during the past few years, they have been a burst into the market of black pearls in small and medium sizes, with an amazing variety and quality. Mainly these pearls are Freshwater Pearls, tha natural violet color, obtained from the mussel called Ikekou - Unio Margaretafera Oyster - and also the Cumingi de Hyriopsys both from fresh waters, that later have been radiated to obtain colors of darker tones.

It means that are pearls cultivated by traditional fresh water methods that later have been put under an irradiation treatment, so that the nacre crystals are reoriented generating the effect of the dark colors, very similar to the natural color obtained by the Black Thaitinian Pearl. The obtained colors are intrinsic of the pearl, and therefore permanent, reason why they maintain the gem category.