Seawater pearls:
It belongs to nucleated culture, because there are implanted round cores, and the roundness is better than that of freshwater pearls. After the selection of pearl farms and jewelers, most of the seawater pearls circulating in the market and presented to customers are fine round, perfect round and nearly round, and water drop shape and baroque shape are also common.
Freshwater pearls:
It belongs to a nuclear-free culture (except Edison Pearl). Because they are seedless, the roundness of most freshwater pearls is not very good, and most of them are nearly round, oval, button-shaped, steamed bread-shaped, water-drop-shaped and irregular (baroque).
Second, scale.
1, AKOYA pearl: 2mm-10/0mm.
Pinctada martensii cultured with AKOYA pearls belongs to small-volume shellfish, and the size of AKOYA pearls is mostly 6 mm-8 mm
2. Tahiti pearls: 8mm- 16mm.
3. Nanyang pearl: 8mm-20mm
The white butterfly that cultivates Nanyang pearl is the largest of all mother-of-pearl varieties, and its size is mostly11mm-15 mm.
4. Freshwater pearls: 3mm- 13mm.
Third, luster.
The luster of seawater pearls is stronger than that of freshwater pearls.
Gloss: Meibei Pearl > AKOYA Pearl > Tahiti Pearl > Nanyang Pearl > Freshwater Pearl.
High-quality freshwater pearls can also be comparable to AKOYA pearls in roundness and luster. It's not easy to tell the difference at this time. You can carefully observe the skin condition. Freshwater pearls have delicate skins, and AKOYA pearls have unique textures, which can be distinguished.
Fourth, nuclear and non-nuclear
Seawater pearls belong to nucleated culture, and the mantle slices of other Pinctada are inserted into the mantle of Pinctada together with the round nucleus ground from the shell of Pinctada.
The nacre of seawater pearls is thin, and the pearl core and pearl layer can be seen from the pearl hole.
Freshwater pearls belong to seedless culture, and only the mantle slices of mother shells are inserted in the mantle of pearls.
Freshwater pearls are all composed of nacre, and only nacre can be seen from the pearl hole.
Reference source: Baidu Encyclopedia-Freshwater Pearl
Reference source: Baidu Encyclopedia-Seawater Pearl