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nacre    
n. 珠母贝,真珠质

珠母贝,真珠质

nacre
n 1: the iridescent internal layer of a mollusk shell [synonym:
{mother-of-pearl}, {nacre}]

Nacre \Na"cre\ (n[=a]"k[~e]r), n. [F., cf. Sp. n['a]cara,
n['a]car, It. nacchera, naccaro, LL. nacara, nacrum; of
Oriental origin, cf. Ar. nak[imac]r hollowed.] (Zool.)
A pearly substance which lines the interior of many shells,
and is most perfect in the mother-of-pearl. [Written also
{nacker} and {naker}.] See {Pearl}, and {Mother-of-pearl}.
[1913 Webster]


Nacr'e \Na`cr['e]"\ (n[.a]*kr[=a]"), a. [F. See {Nacre}.] (Art)
Having the peculiar iridescence of nacre, or mother-of-pearl,
or an iridescence resembling it; as, nacr['e] ware.
[Webster 1913 Suppl.]


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  • Nacre | Pearl Education - Pearl-Guide. com
    Nacre is Composed of Aragonite Platelets Pearls and Mother-of-Pearl are made from Calcium Carbonate, which exists naturally in two different forms: Calcite and Aragonite The shells of most mollusks (those without mother-of-pearl shell) are made from Calcite, and fewer will produce and display Aragonite, which forms hexagonal shaped crystals
  • Lustre and nacre thickness | Pearl Education - Pearl-Guide. com
    Hello humans! Just looking to see if I can get some insight into the correlation of nacre thickness and lustre quality in cultured pearls Most of the online resources I've read that explain pearl quality and grading seem to assert that in cultured saltwater pearls, a thicker deposit of nacre
  • Edison pearls nacre thickness. - pearl-guide. com
    Thank you, for the pearl also! Homogeneous nacre allow this special colour effect, as if colours of reliefs and hollow parts doing cumulative actions, and so much as carving is deep, up to a limit, when light can't touch the bottom of carving It's why I am desolate about so thin nacre around many pearls
  • Artificial Nacre Synthetic mother of pearl - Pearl Guide
    Getty Images THE GIST: Artificial nacre, or mother of pearl, can now be mass-produced The material is flameproof, super strong and as cheap as paper to make It could be used to fireproof homes and to make cars more fuel efficient A natural pearl is a rare treasure, but new mass-produced mother of pearl could soon be as cheap and versatile as
  • Mother-of-Pearl (MOP) | Pearl Education - Pearl-Guide. com
    Mother-of-Pearl Defined Mother-of-Pearl (MOP for short) or Nacre (as it is also known) is the iridescent coating on the inside of some mollusk species which is composed of aragonite and calcite, both being calcium carbonate polymorphs MOP also contains water and binding proteins secreted by the mollusks, the most important being conchiolin
  • Cause of Several Layers of Missing Nacre in Natural Pearls such as this?
    Hi All, Came across these photos of an Antique (natural ?) pearl and am naturally find it very interesting I have wondered before what is the actual cause of missing nacre such as this pearl displays in abundance Could it be a parasite? Or could it be something else inside the oyster
  • The Pearl Nucleus | Pearl Education - Pearl-Guide. com
    Pearl Nucleus Defined A pearl nucleus is a bead or other object implanted into the gonad of a marine mollusk or into an existing pearl sac in the gonad or mantle of a freshwater mussel around which nacre deposition occurs The Pearl Nucleus and Nucleation Grafting Pearl farms vary depending on
  • Worn Nacre | Pearl Education - Pearl-Guide. com
    Nevertheless there is one way to get a solid nacre sea pearl; buy keshi You mostly give up roundness, but you have a wearable item thsat will last generations Caitlin How to hand-knot pearls without a tool My avatar is a Sea of Cortez mabe pearl One of a pair of Mexican handmade earrings
  • How long time for a pearl of size. . . . - Pearl-Guide. com
    The nacre deposition can be up to 5mm per year in China, and slightly less in most of Japan The average culture time for both (today) is 9-12 months The chalky, thin skin akoya may have only been in the host for 3-4 months, however Hopefully this is starting to change Our farm, Xuwen Pearl Paradise Ltd , purchased seeded oysters last summer
  • South Sea Pearls Nacre Thickness - Pearl Guide
    There are no standards for nacre thickness in South Sea pearl production, at least not in the way there is in French Polynesia But the nacre is typically very thick (2-4mm), at least when not dealing with indicator pearls, which I have not seen around in a while If the pearl is baroque it could definitely have thinner nacre on one side than the other, and thinner nacre does not mean the





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