Pearls are one of the most well known gemstones in the world. In literally every culture and continent, pearls are held in high regard, and as a natural gemstone, it has no equal. Pearls are grown within the confines of the shells of mollusks, but only mollusks with inner shells that have the iridescent material called nacre, or mother of pearl as a surface lining, will produce commercial grade pearls. Pearls come about as a result of an intrusive, foreign object finding its way into the pearl oyster. In response to this “intrusion,” pearl oysters will develop layers of nacre
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