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Encyclopedia > Nacre

Nacre, also known as mother of pearl, is a naturally occurring organic-inorganic composite. Mother of Pearl (1999) is a novel by Melinda Haynes, and was chosen as an Oprahs Book Club selection, June 1999. ...

The iridescent nacre of a Nautilus
The iridescent nacre of a Nautilus

Contents

Download high resolution version (1095x862, 107 KB) Wikipedia does not have an article with this exact name. ... Download high resolution version (1095x862, 107 KB) Wikipedia does not have an article with this exact name. ... Genera Allonautilus Nautilus Nautilus (from Greek ναυτίλος, sailor) is the common name of any marine creatures of the cephalopod family Nautilidae, the sole family of the suborder Nautilina. ...

Description

Nacre is composed of hexagonal platelets of aragonite (calcium carbonate (CaCO3) crystals) that are 10-20 µm wide and 0.5 µm thick, arranged in a continuous parallel lamina. The layers of platelets are separated by sheets of organic matrix that are composed of elastic biopolymers (such as chitin, lustrin and silk-like proteins). This mixture of brittle platelets and the thin layers of elastic biopolymers makes the material strong and resilient. Strength and resilience are also likely to be due to adhesion by the "brickwork" arrangement of the platelets, which inhibits transverse crack propagation. This design at multiple-length sizes increases its toughness enormously, making it almost equivalent to that of silicon. Aragonite Aragonite is a polymorph of the mineral calcite, both having the chemical composition CaCO3. ... Calcium carbonate is a chemical compound, with the chemical formula CaCO3. ... Crystal (disambiguation) Insulin crystals A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... Look up elastic in Wiktionary, the free dictionary. ... A biopolymer is a polymer found in nature. ... Structure of the chitin molecule, showing two of the N-Acetylglucosamine units that repeat to form long chains in beta-1,4 linkage. ... For other uses of this word, see Silk (disambiguation). ... General Name, Symbol, Number silicon, Si, 14 Chemical series metalloids Group, Period, Block 14, 3, p Appearance as coarse powder, dark grey with bluish tinge Standard atomic weight 28. ...


The iridescent appearance of the nacre is due to the fact that the thickness of the aragonite platelets are about 0.5 micrometres, which is comparable to the wavelength of visible light. This results in constructive and destructive interference of different wavelengths of light, resulting in different colors of light being reflected at different viewing angles. The iridescence of the Blue Morpho butterfly wings. ... Interference of two circular waves - Wavelength (decreasing bottom to top) and Wave centers distance (increasing to the right). ...


Nacre is secreted by the epithelial cells of the mantle tissue of certain species of mollusk. In these mollusks, nacre is continually deposited onto the inner surface of the animal's shell (the iridescent nacreous layer, commonly known as mother of pearl), both as a means to smooth the shell itself and as a defense against parasitic organisms and damaging detritus. In zootomy, epithelium is a tissue composed of a layer of cells. ... Drawing of the structure of cork as it appeared under the microscope to Robert Hooke from Micrographia which is the origin of the word cell being used to describe the smallest unit of a living organism Cells in culture, stained for keratin (red) and DNA (green) The cell is the... The mantle is an organ found in mollusks. ... Classes Caudofoveata Aplacophora Polyplacophora Monoplacophora Bivalvia Scaphopoda Gastropoda Cephalopoda † Rostroconchia The mollusks or molluscs are the large and diverse phylum Mollusca, which includes a variety of familiar creatures well-known for their decorative shells or as seafood. ... The iridescence of the Blue Morpho butterfly wings. ... A parasite is an organism that spends a significant portion of its life in or on the living tissue of a host organism and which causes harm to the host without immediately killing it. ...


The iridescent inner layer is considered highly attractive by many cultures and is often used in making jewelery or as inlays in wood furniture and fret inlays for guitars. Jewellery (spelled jewelry in American English) consists of ornamental devices worn by persons, typically made with gems and precious metals. ... welcome:: This is an article about items in a room. ... For other uses, see Guitar (disambiguation). ...


When a mollusk is invaded by a parasite or is irritated by a foreign object that the animal cannot eject, a process known as encystation entombs the offending entity in successive, concentric layers of nacre. This process eventually forms what we call pearls and continues for as long as the mollusk lives. A parasite is an organism that spends a significant portion of its life in or on the living tissue of a host organism and which causes harm to the host without immediately killing it. ... Freshadama grade cultured freshwater pearls. ...


Chief sources are the pearl oyster, found in warm and tropical seas, primarily in Asia; freshwater pearl mussels, which live in many rivers of the United States, Europe, and Asia; and the abalone of California, Japan, and other Pacific regions. Crassostrea gigas, Marennes-Oléron Crassostrea gigas, Marennes-Oléron Crassostrea gigas, Marennes-Oléron, opened The name oyster is used for a number of different groups of mollusks which grow for the most part in marine or brackish water. ... For other uses, see Asia (disambiguation). ... Freshwater pearls are a kind of pearl that comes from freshwater mussels. ... For other uses, see Europe (disambiguation). ... For other uses, see Asia (disambiguation). ... Species Many, see species section. ... Official language(s) English Capital Sacramento Largest city Los Angeles Largest metro area Greater Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... “Pacific” redirects here. ...


Decorative uses

 Inlay with nacre tesserae Bagdad pavilion, Topkapı Palace, Istanbul, Turkey
Inlay with nacre tesserae

Bagdad pavilion, Topkapı Palace, Istanbul, Turkey

Both black and white mother of pearl are used for architectural purposes. The natural mother of pearl may be artificially tinted to almost any color. Mother of pearl tesserae may be cut into shapes and laminated to a ceramic tile or marble base. The tesserae are hand-placed and closely sandwiched together, creating an irregular mosaic or pattern (such as a weave). The laminated material is typically 1/16 of an inch thick. The tesserae are then lacquered and polished creating a durable, glossy hard surface. Image File history File links Metadata Size of this preview: 450 × 600 pixelsFull resolution (1536 × 2048 pixel, file size: 1. ... Image File history File links Metadata Size of this preview: 450 × 600 pixelsFull resolution (1536 × 2048 pixel, file size: 1. ...


Instead of using a marble or tile base, the mother of pearl tesserae can be glued to a fiberglass mesh. The result is a lightweight material that offers a seamless installation, and there is no limit to the sheet size. Mother of pearl sheets may be used on interior floors, exterior and interior walls, countertops, doors and ceilings. Insertion into architectural elements, such as columns or furniture is easily accomplished. Bundle of fiberglass Fiberglass (also called fibreglass and glass fibre) is material made from extremely fine fibers of glass. ...


Clothes & accessories

Mother of pearl buttons can be found on a variety of clothing such as shirts, skirts and coats. Nacre is also used as a decorative feature of watch faces and jewellery.


Musical Instruments

Key touches and various decorations on musical instruments such as saxophones, trumpets, violins and guitars are sometimes made of mother of pearl. It is used as inlays on many guitar fretboards e.g. the Gibson J-200. Synthetic key touches made of Pyralin or similar imitation materials have been affectionately referred to as mother of toilet seat by musicians. The saxophone (colloquially referred to as sax) is a conical-bored instrument of the woodwind family. ... The trumpet is a musical instrument in the brass family. ... The violin is a bowed string instrument with four strings tuned in perfect fifths. ... For other uses, see Guitar (disambiguation). ... 1960 Gibson J-200 Gibson J-200 (Super Jumbo 200) is an acoustic guitar model produced by the Gibson Guitar Corporation. ...


References

  • Lin, A.; Meyers, M.A. (2005-01-15). "Growth and structure in abalone shell". Materials Science and Engineering A 390: 27–41. DOI:10.1016/j.msea.2004.06.072. 
  • Mayer, G. (2005). "Rigid biological systems as models for synthetic composites". Science 310: 1144–1147. 
  • Bruet, B.; et al. (September 2005). "Nanoscale morphology and indentation of individual nacre tablets from the gastropod mollusc Trochus niloticus". J. Mater. Res. 20 (9). DOI:10.1557/JMR.2005.0273. 

A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ... A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ...

See also

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Category:Mother of pearl
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  Results from FactBites:
 
Nacre - Wikipedia, the free encyclopedia (651 words)
The iridescent appearance of the nacre is due to the fact that the thickness of the aragonite platelets are about 0.5 micron, which is comparable to the wavelength of visible light.
Nacre is secreted by the epithelial cells of the mantle tissue of certain species of mollusk.
In these mollusks, nacre is continually deposited onto the inner surface of the animal's shell (the iridescent nacreous layer, commonly known as mother of pearl), both as a means to smooth the shell itself and as a defense against parasitic organisms and damaging detritus.
Pearls Nacre At Pearl-Guide.com (127 words)
Nacre, also known as mother-of-pearl, is the basic substance which is secreted by oysters and mollusks to form the inside of their shells.
Nacre is composed of layers of calcium carbonate (in a crystalline form) and conchiolin (an organic protein substance which provides bonding).
The specific luster, iridescence, and coloring of nacre -- and, therefore, of any pearl which it forms -- depends on the number and thickness of the various layers, as well as on whether or not the layers overlap one another.
  More results at FactBites »

 
 

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