Lustre or Luster may refer to:
Luster, Norway, a municipality in Norway
Lustre (mineralogy), a description of the way light interacts with the surface of a crystal, rock, or mineral ...
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Lustre
For cultured pearl experts, lustre is perhaps the most important indicator in evaluating cultured pearl quality. Lustre is what separates the inferior pearl from the superior and the ordinary from the extraordinary.
Lustre
Pearls produce an intense, deep shine called lustre. This effect is created when light reflects off the many layers of tiny calcium carbonate crystals that compose the pearl. This substance is called nacre.
Lustre - A combination of surface brilliance and a deep glow that seems to emanate from within the heart of a pearl.
Lustre
The appearance/shininess of a pearl's surface judged by its ability to reflect light. One of the most important factors in judging and pricing pearls.
Mabe pearls ...
LUSTRE. The optical character of a gem, dependent upon that portion of the light falling upon it which is reflected from the surface. Degrees of lustre: splendent, shining, glistening, glimmering.
Lustre
Colorless transparent coatings that give a very high gloss to the underlying surface.
M
Marquise
An oval shaped gemstone cut with pointed ends. It's named for the Marquise de Pompadour, mistress of King Louis XV.
Lustre: In cultured pearls, this refers to the degree of mirror-like finish in the nacre.
Lustre - There is evidence of this technique on both a clear lead glaze and an opaque tin glaze, from about 850AD in Iraq. The colors were always various tones of yellow, graduating to a rich coppery brown.
Low lustre: Pearls surface appears "chalky" and/or "milky."
High lustre: Pearl surface reflects light and shows mirror-like reflections.
Lustre is the most important factor in choosing pearls. The inner glow of the pearl combined with the surface brilliance defines lustre. The higher the lustre, the thicker the nacre or secretion from the oyster and the stronger the glow.
Lustre, Luster
The lustre of a diamond is its highly reflective surface sheen due to its high refractive index combined with the highly polished surfaces.
Lustre is the degree to which a diamond or gemstone reflects light.
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Waxy lustre
Major Sources
Brazil, India, Madagascar, Mexico, South Africa,
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Lustre
Used to describe the way the surface of a gemstone and light relate with each other.
Mariner Link Chain
Also called an anchor link chain, this chain is made up of oval links with a strip of metal down the middle of each link.
Luster (lustre)
The quantity and quality of light reflection from the surface of the stone. The amount of luster is influence by the polish of the surface, harder stones can be better polished. Like Diamond or Sapphire.
metallic lustre with dark areas.
Fools Gold Pyrite$ 24.99
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217.00 ct.
Luster " Lustre is the inner brilliance that deepens and grows as the number of pearl layers increase. This brilliance is the single most important factor in selecting pearls! ...
"As well as the lustre of the pearl the dealer also looks for the colour. This is best assessed when the pearl is placed on a sheet of completely white paper and examined by north light." ...
Lustre is one of the most important qualities of a pearl, referring to the reflection of light off the surface of a pearl and the refraction of light from its layers of nacre. It is sometimes referred to as the glow of the pearl.
This gem, with its discreet yet rather greasy lustre, which comes in many fine nuances of green, but also in shades of white, grey, black, yellow, and orange and in delicate violet tones, has been known to Man for some 7000 years.
Fracture lustre: oily
Luster: vitreous to oily
Diaphaneity: translucent to transparent
Colors: yellow-green bright green olive green brownish-green
Phenomena: asterism and chatoyancy extremely rare
Specific gravity: 3.27 to 3.37
Hardness: 6.
It forms other samples of vitreous or glassy lustre and medium refractive index; its surface may also be rough, giving a dull, earthy and almost lustreless appearance.
Azurite possesses a density of 3.77 to 3.
Pearl grades: The quality of a pearl is determined by its Lustre (reflectivity and depth of shine) and Surface (smoothness vs. pits/blemishes on surface).
Step back, look at the entire strand, and decide for yourself if they are matched for colour, even in shape, consistent in lustre and sheen from each pearl to the next, and have a very consistent appearance.
Gold's malleability, color and lustre made it the desirable product it has been since those times. It's density is so high that extracting gold from alluvial deposits is very easily done by uncomplicated techniques like panning or sluicing.
The most famed and fabled of red gemstones, Ruby is desirable for its bright red colour, durability, lustre, and rarity. Transparent Rubies of large sizes are even rarer than Diamonds.
The name denotes a calcareous concretion with a silvery lustre formed within the shell of certain bivalve molluscs known as pearl oysters around some foreign body.
Lustre enhancement: Any treatment or process applied to enhance the lustre of a natural or cultured pearl ...
Perles de culture avec un lustre magnifique, une qualité parfaite. Le prix des perles de culture d'eau douce est très abordable pour des perles de culture de meilleure qualité que les perles de Tahiti, ou les perles des mers du Sud.
A term that means having a lustre like that of a diamond
Adularia
A common type of moonstone, a whitish-bluish semi-translucent stone usually set as a cabochon.
A mineral that is reddish-brown to red, sometimes yellowish, and has a brilliant lustre. It is sometimes found as a needle-like inclusion in some gemstones, e.g. Sagenitic quartz and sagenite.
Other factors in the price of a pearl are color, lustre and its surface. Ideally the perfect pearl would be silvery white, very reflective and contain no surface blemishes.
Identification in hand sample:
Lustre, colour and habit are indicative.
Associations:
Formed by hydrothermal action of mafics and ultramafics. Associations may include talc, calcite, brucite, chlorite, magnetite and chromite.
Its adamantine lustre and high colour dispersion make colourless variants of zircon appear similar to diamond. As a gemstone it is relatively unpopular. This may be due to confusion between zircon and cubic-zirconia.
Although it has a dirty grey colour in the rough, cut stones aquire a metallic lustre and a beautiful sheen at the right angle. The stones are usually cut with a flat surface and have been carved as cameos.
Turquoise is opaque except in the thinnest splinters, and has a feeble, faintly waxy lustre. The name turquoise undoubtedly comes from turc (Turkish in French) as it was transported to Europe through Turkey. BEADED JEWELS ...
Satin finish - A matte finish achieved by sandblasting, brushing with a stiff wire brush, or chemically altering a surface. Satin finish has a soft, pearl-like lustre
Scalloped - An ornamental edge that consists of a series of curves ...
The Lustre of the pearl cannot be hidden and that would be the best test to determine whether a pearl necklace is of "A" grade or "AA" grade. It makes sense to check each pearl for luster and flaws before buying an expensive piece.
Intensity of the internal and external reflections of white light from the crown of a polished diamond or other gemstone. Hardness, refractive index, reflectivity, polish, lustre and proportions all affect a gemstone's brilliance.
Brilliant Cut ...
These examples were etched from enclosing carbonates. Some crystals have hollows and holes apparent
since the dissolution of the enclosing carbonate.
The crystals are dull in lustre.
GALENA
Whitesmith Mine, Strontian, Argyll.
Twinned crystals to 5mms.
Pewter is an metal alloy that is composed mostly of tin combined with antimony, bismuth, copper, and/or silver (the formulation varies quite a bit). When pewter is polished it has a silvery lustre. Most pewter is over 90 percent tin.
The name Demantoid means diamond-like, because it has a very high adamantine lustre, and a colour dispersion higher than diamond. Demantoid garnet is a rare and beautiful bright grass green sub-variety of andradite garnet.
It maintains its polish for a longer period of time and thus retains its lustre, contributing to its popularity as a popular gemstone . Found in many colors it is most widely available in brown and yellow.
1960), Marvellescence (first used June, 1963), Narvellesque (first used June, 1958), Marvelette (first used Sept., 1958), Marvellier (first used Jan., 1958), Marvelissimo (first used Jan., 1948), Marvelock Clasp (first used April, 1950), Marvelustre ...
 See also: Jewel, Stone, Shape, Gemstone, Color
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