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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
    Chemically speaking the nacre is very similar, but you're right, not all nacre lays the same With akoya, thick nacre is very important in achieving high luster because it's a measurement of both reflected light and iridescence You won't have light interference creating iridescence if the nacre isn't thick enough
  • South Sea Pearls Nacre Thickness - Pearl-Guide. com
    2) Thick nacre makes good luster However, I recently saw a thin nacre coating in a small baroque south sea pearl (it's in a strand) through the drill hole (I'm estimating about 5- 8mm) but the luster of the pearl is great If I'm not mistaken, good luster also may be produced by good nacre quality aside from nacre thickness
  • Cause of Several Layers of Missing Nacre in Natural Pearls such as this?
    The area where the nacre is missing, either from splitting and peeling or other means has so much more lustre than the rest of the pearl When there is a drought or when weather is extremely cold for a few years this shows up in the rings of trees and I wondered it this pearl is suffering from something along that line
  • Edison pearls nacre thickness. | Pearl Education - Pearl-Guide. com
    Very thick nacre, sure, even more than I am searching, and a good information I didn't find anywhere else I'll look for to know what biggest sizes can be found, and where An usual problem with tahitian pearls is their shapes : round, and expensive, or ringed drop, difficult to be used for carving
  • Earring nacre repair? | Pearl Education - Pearl-Guide. com
    Your Life evolves in the same way a Pearl grows: with continuous layers of experiences nacre that add to the Story of your Life on Earth and make you Unique and Beautiful Douglas McLaurin-Moreno Reactions: pattye
  • Question about cultured pearl composition (nacre structure)
    According to the wikipedia article on nacre, argonite structures are 0 5 nanometers in thickness This is incredibly small When looking at radiographs of cultured pearls online, it looks as if there is a gap between the nucleus and the nacre At first I thought that this gap was a flaw; that the nucleus was seperated from the nacre
  • South Sea Pearl Nacre Thickness | Pearl Education - Pearl-Guide. com
    Nacre thickness is actually measurable It's how much "pearl" is actually laid down on the nucleus (which is usually a round bead made from mussel shell Generally speaking, the thicker the nacre, the better the pearl, but that doesn't necessarily mean the pearl will have more luster than a pearl with thinner nacre Some pearls are more matt
  • Windowpane Pearls: Calcitic nacre? - Pearl-Guide. com
    Nacreous-appearing calcite has implications for other threads in this forum that have debated the definition of nacre and the significance of aragonite in the classification of pearl qualiity Another intriguing aspect of these pearls is that they flouresce red under UV, exactly the same as Pteria Sterna (Sea of Cortez), thus throwing a wrench
  • Mother-of-Pearl (MOP) | Pearl Education - Pearl-Guide. com
    To give you an idea of the superior resistance of MOP or nacre, consider this: In 2014, researchers used lasers to create an analogue of nacre by engraving networks of wavy 3D "micro-cracks" in glass When the slides were subjected to an impact, the micro-cracks absorbed and dispersed the energy, keeping the glass from shattering





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