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  2. Pearl - Wikipedia

    en.wikipedia.org/wiki/Pearl

    Natural black pearls are rare, with black pearls having a body color that may be assessed as silver, silver blue, gold, brown-black, green-black, or black. [ 20 ] Black cultured pearls from the black pearl oyster – Pinctada margaritifera – are not South Sea pearls, although they are often mistakenly described as black South Sea pearls.

  3. Tahitian pearl - Wikipedia

    en.wikipedia.org/wiki/Tahitian_pearl

    A true black Tahitian pearl is extremely rare, and largely considered one of the most beautiful kinds of pearls in the world. Most Tahitian pearls that are identified as “black” are actually charcoal grey, silver, or dark green. [4] The cultured Tahitian pearl comes in various shapes, which include round, semi-round, button, circle, oval ...

  4. Pinctada maxima - Wikipedia

    en.wikipedia.org/wiki/Pinctada_maxima

    Pinctada maxima produces South Sea pearls in colors ranging from white, silver, champagne, gold. Pinctada margaritifera produces South Sea pearls commonly referred to as Tahitian pearls or black pearls which in fact come in color hues including gray, platinum, charcoal, aubergine, and peacock. Currently south sea pearls are cultured primarily ...

  5. Gemstone irradiation - Wikipedia

    en.wikipedia.org/wiki/Gemstone_irradiation

    Pearls are irradiated to produce gray blue or gray-to-black colors. [24] Methods of using a cobalt-60 gamma ray facility to darken white Akoya pearls were patented in the early-1960s. [31] But the gamma ray treatment does not alter the color of the pearl's nacre, therefore is not effective if the pearl has a thick or non-transparent nacre. [31]

  6. Servilia's pearl - Wikipedia

    en.wikipedia.org/wiki/Servilia's_pearl

    Servilia's pearl was a pearl given by Julius Caesar to his favourite mistress Servilia.It was described by imperial biographer Suetonius to be a lone (uniones, meaning "singleton") [1] large black pearl [2] worth six million sesterces (approximately 1.5 billion dollars in 2019 value), making it perhaps the most valuable gem of all time.

  7. Behind the Gates: Inside the wealthy black community that ...

    www.aol.com/news/behind-gates-inside-wealthy...

    Long before it was an axis for Washington DC's black elite, in the 1800s, Prince George's County was once known to house the most enslaved African Americans in all of Maryland, says Susan Pearl, a ...

  8. Pinctada margaritifera - Wikipedia

    en.wikipedia.org/wiki/Pinctada_margaritifera

    Pinctada margaritifera, commonly known as the black-lip pearl oyster, is a species of pearl oyster, a saltwater mollusk, a marine bivalve mollusk in the family Pteriidae. This species is common in the Indo-Pacific within tropical coral reefs. The ability of P. margaritifera to produce pearls means that

  9. Pinctada - Wikipedia

    en.wikipedia.org/wiki/Pinctada

    Black South Sea pearls, or Tahitian pearls come from the black-lip oyster; gold and silver South Sea pearls from the gold-lip and silver-lip oysters; and Akoya cultured pearls from Pinctada fucata martensii, the Akoya pearl oyster. Pearls are also obtained in commercial quantities from some species of the closely related winged oyster genus Pteria.

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