Aktualizováno: 13. 12. 2019
✍ Pearls are the only jewels created by a living animal.
Pearls actually come in an array of different shapes. They are formed when an irritant such as a tiny stone or bit of sand gets inside the mollusk's shell. A lustrous substance, called nacre, is secreted around the object to protect the soft internal surface of the mollusk. As layer upon layer of nacre coats the irritant, a pearl is formed. Light that is reflected from these overlapping layers produces a characteristic iridescent luster. This process of building a solid pearl can take up to seven or eight years.
The color of the pearl depends on the color of the inside of the shell it comes from - blue, grey, yellow, green, pink or orange hues which are then absorbed into the surface of the pearl. As for the allusive black pearls, they get their color from a very specific type of black-lipped Tahitian oyster.
The majority of pearls you see today are cultured or human- or farm-made pearls. An irritant is implanted within the oyster to mimic the natural formation of a pearl.
The most valuable pearls are perfectly symmetrical, relatively large and naturally produced.
A natural pearl of value is found in less than 1 in every 10,000 wild oysters.
Pearl is the birthstone for June.
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