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Black pearls are actually very dark gray with undertones of blue, green, or purple. They are becoming more common and affordable due to cultivation. Sets with perfectly matched pearls are expensive.
A pearl is a hardened ‘stone’ formed inside certain types of oysters as a protection against sand that has gotten into their shells. Black pearls are not really black, but rather a very dark gray, with undertones such as blue, green, or purple. For centuries, they were prized for their rarity; Most pearls are white, cream-colored, or a very pale shade like pink. White pearls can be dyed to appear naturally black by immersing them in a silver nitrate solution. Experts can easily distinguish a fake black pearl from the real thing.
However, real black pearls are becoming more and more common as cultured or cultured pearls, and their price has consequently become much more affordable. Black pearls can vary widely in darkness of color, hue, and iridescence. Iridescence is that quality that allows a stone to display different colors when light is struck from different angles.
Cultivating pearls is a practice of more than a hundred years. To ‘farm’ pearls, instead of harvesting oysters and searching for natural pearls, a bit of grain is stuffed into the shell of an oyster. For two to three years, the oyster secretes a coating over the sand to prevent it from irritating the oyster’s soft meat. The coating is in the same shade as the mother-of-pearl or mother-of-pearl coating of the natural shell of the oyster. A species of oyster native to the Polynesian islands, the Pinctada margaritifera or giant black-lipped oyster, will produce dark colored pearls, or ‘black’ pearls, when farmed.
Black pearls are very popular in modern jewelry making. They are combined in color and iridescence, or black pearls of different shades and shades come together. Sets with perfectly matched pearls are much more expensive, due to the difficulty of finding stones that cannot be distinguished from each other.
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