Natural Pearls form when an irritant - usually a parasite works its way into an oyster, mussel, or clam. As a defense mechanism, a fluid is used to coat the irritant. Layer upon layer of this coating, called 'nacre', is deposited until a lustrous pearl is formed.

Natural Pearls form when an irritant - usually a parasite works its way into an oyster, mussel, or clam. As a defense mechanism, a fluid is used to coat the irritant. Layer upon layer of this coating, called 'nacre', is deposited until a lustrous pearl is formed.

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Stock photo: Natural Pearls form when an irritant - usually a parasite works its way into an oyster, mussel, or clam. As a defense mechanism, a fluid is used to coat the irritant. Layer upon layer of this coating, called 'nacre', is deposited until a lustrous pearl is formed. was taken by dr.balaji on 20-10-2017 with Xiaomi model Redmi Note 4 . DPI width: 72.0, height 72.0 . White balance settings: 0.