The color of this gem ranges from black to white, depending on the mollusk & it's environment
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Encyclopedia of Gemstones - Pearl. Pearl's color ... - All Gem Stones  Color: The color of pearls varies with the mollusk and its environment. It ranges from black to white, with the rose of Indian pearls esteemed most. Other colors...
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About Genuine Pearls - Looney Maiden Bridal Jewelry  Pearls are an organic gem, created when an oyster covers a foreign object with beautiful ... The all-nacre Biwa pearls formed in colors unseen in saltwater pearls. ... The color of pearls used in jewelry varies with the mollusk and its environment. It ranges from black to white, with the rose of Indian pearls esteemed most.
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Gemstone Facts - Durango Silver Company  A brief list of gemstones, gemstone facts and gemstone history. ... Its color, luster, warmth, aroma, electric properties and background, in a scientific sense, place amber in a ...... Color: The color of pearls varies with the mollusk and its environment. It ranges from black to white, with the rose of Indian pearls esteemed most.
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pearl | gemstone | Britannica.com  Jun 26, 2015 ... The colour of pearls varies with the mollusk and its environment. It ranges from black to white, with the rose of Indian pearls esteemed most.
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Physical and Chemical Properties of Stones - Semiprecious.com  Citrine is a semiprecious gem that is valued for its yellow to brownish color and its resemblance to the ... The gemstone changes colors depending upon which angle it is viewed from. .... The color of pearls varies with the mollusk and its environment. It ranges from black to white, with the rose of Indian pearls esteemed most.
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Guide to Gemstones - Colors & Meanings | Wixon Jewelers  Join us as we explore the world of color gemstone jewelry. ... If you love magic, especially the magic of science, you'll love Alexandrite, the color-change ... March Birthstone ... brings to mind its stunning pastel sky blue or the bright color of the sea. ... It was long thought that Aquamarine has a soothing influence on married...
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Quartz Gemstone and Jewelry Information: Natural Quartz - GemSelect  Sep 29, 2006 ... The name 'quartz' is thought to be derived from the German word 'quarz', which .... It is closely related to citrine quartz, but is more lemon yellow in color, whereas .... Scenic agate: Agate chalcedony quartz where included dendrites resemble ... It's harder than most other materials, but still softer than popular...
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Ruby Quality Factors - GIA  These untreated and heat-treated rubies show a range of darker and brighter red colors. ... The highest-quality rubies have vivid color saturation. ... Some gem dealers debate the borderline between ruby and pink sapphire. ... Historically, the term pigeon's blood described the red to slightly purplish or pinkish red color of...
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Guide to Gemstones - Colors & Meanings | Wixon Jewelers  The value of the gemstone increases as the color change becomes more distinct. ... Today, Citrine is known as the merchant's stone and is associated with success ... These reasons make it a great gem for that big, bold, statement piece. ... This gem is available in a rainbow of colors, from the deep red Bohemian Garnet to...
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Agate - Wikipedia  Agate /t/ is a cryptocrystalline variety of silica, chiefly chalcedony, characterised by its ... Color, White to grey, light blue, orange to red, black. banded ... in the successive layers, so that bands of chalcedony often alternate with layers of crystalline quartz. ... Agatized coral is often referred to as Petoskey stone or agate.
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aquamarine - Search-ID.com  Aquamarine (Lat. aqua marin, "water of the sea") is a gemstone-quality transparent ... This "sea-colored" gem, a birthstone for March, should be cleaned often to retain its sparkle; The name of this transparent blue-green gem comes from the...
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Green Gemstones: List of Green Precious Gem Types for Jewelry ...  Jul 2, 2014 ... Cat's eye actinolite is typically yellowish to green in color, although it does occur .... Gaspeite often features interesting brownish veins and has a similarity ... Kornerupine is a rare green collector's gem named after its Danish...
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Birthstone Facts & Legends | Perry's Fine Antique & Estate Jewelry  Although purple has come to signify February's birthstone, amethyst can appear in ... Aquamarine ranges in color from pale, icy blue to sea-foam bluish-green to a deep blue. ... Queen Elizabeth I of England especially coveted pearls, and would buy ... Alexandrite is looked upon as a good omen in Russia and is sometimes...
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The Sea Slug Forum - Flabellina pedata  The colour of the digestive gland (and therefore the cerata) varies from red to pink, ... nor if it is a genetic anomaly that can be seen in other species, but I found it to ... Spain, Mediterranean Sea, 27 october 2007, Rocky precoraligen bottom. .... Here is a photo of Flabellina pedata from the Atlantic Ocean. ... October 27, 2001
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GemologyOnline.com  View topic - Imperial vs. Precious Topaz  Jul 14, 2008 ... In my opinion the two are separated by the colour of the stone. An Imperial should contain and Orange, Red or Rich Golden colour as a .... light to see if they will "turn", exhibit pink or peach or sherry. ... Reds and sherries are hard to heat treat. ... I too sometimes think of Imperials as Precious Imperial Topaz.
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Color in Minerals  color perceived depends on the light the object is viewed under: the effect of ... this is the only wavelength range of visible light that can be transmitted by the stone. ... Impurities are elements that occur in low concentration in the gemstone. ... equal sized tranmission windows - the first at blue and second at red wavelengths.
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Amethyst Gemstone | Amethyst Stone - GIA  Amethyst gemstone is the purple variety of the quartz mineral. Amethyst's purple color can range from a light lilac to a deep, intense royal purple, and from...
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Green Gemstones: List of Green Precious Gem Types for Jewelry ...  Jul 2, 2014 ... The pyroxene family is most famous for jadeite and nephrite, but actually .... Although the most desirable color is green, jade gemstones can also be ... usually yellow and green, or red and brown colors that are shown in the...
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Topaz Value, Price, and Jewelry Information - International Gem ...  The rarest are natural pink, red, and fine golden orange, sometimes with a pink tone. ... weaker in SW, greenish white to violet-blue in X-rays, and gems turn brown due to irradiation. Sherry brown and pink: orange-yellow in LW, weaker in SW, sometimes greenish ... Most blue topaz has been irradiated and heat treated.
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Black Gemstones and Minerals | Gem5.com  ... material composed of lignite, and is a bituminous coal which can be polished. ... Its color is shiny black, with clear conchoidal (shell-like)fracture, its texture ... minerals in which magnesium may be replaced with iron, zinc, and above all, .... Thus diamond is much harder and has a higher specific gravity (3.52) than graphite...
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Gem Silica: The blue, most valuable variety of chalcedony  A bluish green to greenish blue chalcedony that obtains its color from copper. ... in jewelry and is used mainly by a small number of high-end jewelry designers. ... and in limited amounts from locations in New Mexico, Mexico, Peru, Taiwan, and the ... attribute the color to "the same copper salts that give chrysocolla its color.