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Majorica imitation pearls are man-made on solid balls, likely made of glass, that are coated with a proprietary coating that is made in part from fish scales. [1] The coated nuclei are then dried and polished, and then dipped in a chemical (possibly cellulose acetate and cellulose nitrate) to harden the surface and guard against discoloration, chipping, and peeling.
Cultured freshwater pearls are affordable and lend themselves well to various pearl jewelry designs. Pearl jewelry stores may bleach or dye freshwater cultured pearls after harvesting to enhance their color. The most valuable baroque pearls are the South Sea and the Tahitian pearls, which are produced by Pinctada margaritifera (black-lipped ...
The most valuable of these are of the darker variety, as the naturally dark tones of the Tahitian pearls is a unique quality among pearls. Because of their darker hues, Tahitian pearls are commonly known as "black pearls". [3] A true black Tahitian pearl is extremely rare, and largely considered one of the most beautiful kinds of pearls in the ...
More than a decade ago the freshwater pearl industry of China shifted production from the cockscomb pearl mussel to the triangle shell mussel (Hyriopsis cumingii). The triangle shell produced fewer pearls, accepting only 12–16 grafts per valve for a total production of 24 to 32 pearls, but produced pearls of better quality.
Pearls are also graded according to color. While pink pearls and black pearls are also considered to be of good quality, white pearls have traditionally been most popular. A good quality white pearl reflects a lovely sky blue color under ultraviolet light while a poor quality one has a green or mustard-colored sheen. Black pearls that have a ...
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