Nacre

Nacre is regarded as mother of pearl which is a macrobiotic inert composite found in the shells of sea animals in the sea bed.

Nacre
Nacre, also known as mother-of-pearl, is the iridescent material secreted by a mollusk to protect it from irritants, eventually creating a pearl. It also lines the inside surface of an oyster shell.

NACRE:
The silky substance secreted over a "bead" to form a pearl. Layer after layer of nacre builds up to form the pearl.

nacre The iridescent inside of a mollusk shell, which is used as an ornament. Not to be confused with pearl. native Composed of only a single element; not combined with any other elements.

Nacre Thickness : This characteristic determines the life and luster quality of the pearl. Nacre is the successive layers deposited on the nucleus surface of the pearl. It can be thick or thin.

Nacreous Pearls
True pearls are referred to as "nacreous pearls" due to their composition. Such a pearl is formed when a small foreign object makes its way into the soft body of a filter-feeding or grazing mollusk, and cannot be expelled.

NACRE
Nacre is a usually whitish crystalline substance which oysters, mussels, snails, and other mollusks secrete around a foreign object (like a tiny stone) that has made its way into their shell.

Nacre
The smooth, iridescent substance formed around a grain of sand or other foreign matter in the shells of certain mollusks. Over time, these layers build up to form a Pearl.
Nephrite ...

Nacre: The nacre is the substance secreted by the mollusk that actually forms the pearl. The thicker the nacre, the higher quality the pearl, as it will shine more deeply.

Nacre
Pearls are formed inside the shell of certain bivalve mollusks.

Nacre: The shiny iridescent substance secreted by a mollusk as a response to an irritant, like a piece of sand. Over time layers of nacre build up to become a pearl.

Nacre - A shiny, iridescent substance made from the lining of mollusc shells or fish scales
Nephrite - A hard type of jade with colours ranging from white to dark green and grey or brown to black
Nugget - A lump or irregularly shaped mass ...

Nacre
Nacre is a substance that is secreted from a mollusk in order to protect itself from an intruder, like a grain of sand. Layers of nacre will cover the irritant eventually forming a pearl.

nacre The mother-of-pearl secretions of the mollusk; pearl essence.
nailhead Dark center in a gem; see fish-eye.
native cut A poorly proportioned gemstone supposedly fashioned by primitive means; considered pejorative.

Nacre: (Nay-ker) The crystalline substance secreted by an oyster to form a pearl. The microscopic crystals of nacre refract light to produce a pearl's color and luster.

Nacre (‘NAY-ker')
The pearly substance secreted by the mantle of certain molluscs to form a pearl.
Natural pearls ...

Nacre: The substance secreted by the oyster or other mollusk that surrounds the darker conchiolin and subsequently forms the outer layers of the pearl.
Natural: Gem formed without the assistance of humans.

Nacre
A shiny, iridescent substance secreted by a mollusk in response to a foreign substance such as a grain of sand or an inserted bead. Layers of nacre form a pearl.

NACREOUS. Lustre resembling mother-of-pearl, the lining of mollusc shells.
NIGHT EMERALD. Olivine, which loses its yellow tint by artificial light, showing only its green.

Nacre - The iridescent substance secreted by a mollusk during the formation of a pearl that consists of layers of aragonite and calcite crystals.

Nacre: It is the secretion from the mantle of mollusks such as oysters and abalone, which coats an irritant, thereby creating a pearl. Nacre is a mixture of crystalline calcium carbonate and conchiolin.

nacre
The layers of materials secreted by mollusks that form pearls.
natural gemstone ...

Nacre: A crystalline substance that coats the mantle or nucleus within the oyster to form a pearl.

nacre
The crystalline substance made of aragonite and calcite crystals bound together by conchiolin, which mollusks like oysters secrete around foreign objects within their shells, layers of which eventually form a pearl ...

Nacre
The usually whitish crystalline substance which the mollusc secretes around a foreign "intruder" and which forms what we know as the pearl. Layers build up over time.
...

Nacre
Also known as Mother of Pearl is a shiny iridescent substance made from the lining of mollusk shells or fish scales
Nephrite ...

Nacre:
A smooth hard crystalline substance composed of microscopic crystals of calcium carbonate. A mollusk secretes this substance and uses it to coat an irritant that has become lodged in its soft inner body.

Nacre is secreted in a succession of concentric, very thin, translucent layers around the irritant. The aragonite within the nacre is present as slender crystals that are preferentially oriented perpendicular to the surface being deposited.

Nacre Thickness
Nacre thickness is the most important factor when measuring Tahitian pearl quality. It determines how long the beauty of Tahitian pearls will last.

Nacre - The crystalline substance secreted by a mollusk that coats the irritant, eventually producing a pearl.
Natural - Any pearl that is not cultured. Any gemstone that has not been color or clarity enhanced.

Nacre
Also known as mother of pearl, it is naturally formed by layers of calcium carbonate platelets, in the form of aragonite and conchiolin, separated by elastic biopolymers.

Nacre
Nickel silver
A composition that contains no silver, an alloy of nickel, copper and zinc ...

NACRE - The iridescent substance containing aragonite and calcite crystals. This is an important outside layering material and a constituent of a pearl and cultured pearls. The thicker the nacre the longer the pearl has been allowed to grow.

Nacre is a silky substance secreted over a nucleus or other irritant during the formation of a pearl. Layer after layer of nacre builds up to form the pearl.

Non-nacreous melo pearls are produced by melo volutes, which are found along coastal areas of Myanmar as well as Indonesia, Thailand, Cambodia, and Vietnam.

Nacre: (nay-ker) A calcium carbonate-based crystalline substance secreted by mollusks to form mother-of-pearl, pearls, and cultured pearls.

Nacre
A substance produced in mollusk shells that coats particles and other foreign objects. Over time, layers of nacre build up around the particles to form pearls.

N.
Nacre - this is a crystalline layer which is secreted by oysters, mussels and other mollusks around a foreign object. Layers of nacre which form over a period of time create a pearl.

Composed of nacre, the same substance as pearls
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The coating or nacre the mollusk secrets around the intrusion to protect itself create a "cultured" pearl.

Layers of aragonite, known as nacre, are secreted around the irritant and gradually build up to form the solid pearl. Light reflecting from these overlapping layers produces a characteristic iridescent luster, also known as the "orient of pearl.

To protect itself, the oyster coats an intruding object or grain of sand with nacre, a crystalline substance that builds up over time, resulting in a shimmering, iridescent creation. The culturing process developed by man mimics nature.

Cultured - refers to pearls that have been made by the artificial implantation of a nucleus over which a nacre layer grows to form the pearl.
Depth percentage - a ratio between the diameter of the stone and the total depth of the stone.

The irritation caused by the foreign particle makes the oyster secrete nacre to cover it. Nacre is the same material that forms the mollusk's shell.

A pearl's luster is derived from its nacre.
- ONYX
Onyx is a semi-precious stone that is black and white, generally arranged in layers. It is a form of agate with parallel banding. This structure lends itself to cameo making.

A lustrous substance, called nacre, is secreted around the object to protect the soft internal surface of the mollusk. As layer upon layer of nacre coats the irritant, a pearl is formed.

The mollusk secretes nacre, a lustrous substance that coats the intruding object. As thousands of layers of nacre coat the intruder, a pearl is formed; this process takes up to seven or eight years (an oyster's useful life span).

The irritation caused by this foreign particle forces the oyster to form a secretion, called nacre, to cover it. Nacre being the same material that forms the mollusc's shell.

Baroque Pearls are formed when the nucleus drifts toward the muscle of the oyster where the nacre is distributed unevenly resulting in an off round or Baroque Pearl.

A Pearl is an organic gem, produced when certain mollusks, primarily oysters cover a foreign object with beautiful layers of nacre.

In both types the pearly appearance is obtained by lining the interior, or coating the exterior, with more or less numerous layers of what is known as "nacre" or some times as "essence d'oriente.

The color of the dark nacre is determined by the minerals in the oyster's diet (plankton) and in its environment.

Because it is an irritant to the animal, it is slowly coated with a hard substance, called nacre, which builds up in layers over time, forming a finished pearl.

Pearl: An organic gem grown within oysters and other mollusks when they produce nacre as a reaction to an irritant. A good sized pearl can take between five to eight years to form, which is usually the entire life of the oyster or mollusk.

As a mollusk creates a pearl, sometimes the layers of nacre do not adhere smoothly, so spots and bubbles can appear. These imperfections may be small and unnoticeable or large and distinct.

When an object gets inside the shell of a mollusk, it will protect itself by coating the invading object with nacre, which is the same material it uses to coat pearls. Nacre is found in pearl oysters, freshwater mussels and abalone.

A tiny piece of tissue stimulates the freshwater mussel to produce nacre, coating the tiny implant and creating the freshwater cultured pearl.

This substance is called nacre. When selecting a pearl, consider that the larger the pearl, the more nacre it has, so it will also exhibit even more lustre.

Pale South Seas pearls have a thick layer of nacre which may vary in color from white to silver, cream, gold, or even a pale bluish-gray. It is this nacre which gives them their gleaming luster.

The oyster surrounds the intruder with epithelial cells, forming a sac, and then secrets a mixture of nacre and conchiolin onto it.

See also: Pearl, Jewel, Pearls, Natural, Color