Natural pearls

Natural pearls were found in many parts of the world. Present day natural pearling is confined frequently to seas off Bahrain. Australia also has one of the world's most recent remaining fleets of pearl diving ships. Australian pearl divers dive for south sea pearl oysters to be used in the cultured south sea pearl industry. The catch of pearl oysters is similar to the numbers of oysters taken throughout the natural pearl days. Hence large numbers of natural pearls are still found in the Australian Indian Ocean waters from wild oysters. X-Ray examination is required to absolutely verify natural pearls found today.
Natural pearls be 100% nacre. It is thought that natural pearls form under a set of unintentional conditions when a microscopic intruder or grain of sand enters an oyster (mollusk) and settles inside the shell. The oyster, being irritated by the intruder, secretes the pearl substance called nacre to cover the irritant. This process is repetitive for many years, thus producing a pearl.