| This combination of calcium carbonate and conchiolin is called nacre or mother-of-pearl. |
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| Natural nacre also benefits from so-called sacrificial ionic bonds between proteins, which break under stress but can reform. |
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| The nacre, or mother of pearl, is the innermost layer, which is composed of thin, alternating, laminae of calcium carbonate and an organic material. |
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| Continuous layers of nacre grow like onion skins around the particle. |
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| In a similar fashion, pearls and abalone shells are iridescent from the interference caused by reflections from multiple layers of nacre. |
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| Back down they go for several more years, during which time the oyster instinctively surrounds the injected foreign body with nacre, so building up a beautiful pearl. |
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| The mantle of a living oyster is the organ that produces the splendid iridescence called nacre, for which pearls are valued. |
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| The mantle secretes nacre, or mother-of-pearl, by synthesising calcium carbonate from materials in the water. |
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| The oyster coats the sand grain with a silvery shiny layer called nacre. |
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| It is important to strengthen our own ability to empathize and communicate with students to help them nacre the bumps and potholes along the way. |
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| If the covering of nacre is too thin, however, it will deteriorate upon prolonged contact with the acids of the human body and eventually will reveal the mother-of-pearl matrix. |
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| The oysters are first enucleated with perfectly round gemstone beads such as turquoise, amethyst, garnet, citrine, and opal, then left to grow for almost a year to obtain a luxurious nacre, or exterior coating. |
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| Pearls are formed in oysters by the accumulation of nacre, the material lining the oyster shell, around a solid piece of foreign matter that has become lodged inside the shell. |
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| One of the most distinctive microstructures is nacre, or mother-of-pearl, which occurs as an inner layer in the shells of some gastropods and bivalves and in those of the cephalopods Nautilus and Spirula. |
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| Like natural pearls, freshwater pearls consist of solid nacre which gives them an appealing, soft glow. |
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| The processed pigment, remains of which had adhered to the nacre on the shell interiors, was likely used for body decoration or to colour leather clothing. |
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| In nature, pearl oysters produce pearls by covering a minute invasive object with nacre. |
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| Over the years, the irritating object is covered with enough layers of nacre to become a pearl. |
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| The many different types, colours and shapes of pearls depend on the natural pigment of the nacre, and the shape of the original irritant. |
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| Thus it can be classified either as nacre or calcitic semi-nacre. |
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| Most molluscs with shells can produce pearls, but only the pearls of bivalves and some gastropods, whose shells are lined with nacre, are valuable. |
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| We were staying at the big and lively La Cote de Nacre holiday park, a mere 500 metres from the beautiful beach and town. |
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| We were staying at the big, lively La Cote de Nacre holiday park, a mere 500m from the beautiful beach and town. |
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| Although the resort had enough to keep us busy we also chose Cote de Nacre as it was perfectly located to explore the beautiful and historical local area. |
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