Gemology
OPALOverview: Opal is a hydrated silica (SiO2.nH2O) with a water content within the mineral structure. Precious Opal contains 6% - 10% water and consists of small silica spheres arranged in an orderly three dimensional structure. It is created by percolating water in or near sedimentary volcanic ash that dissolves silica of shells, bones and woods, “ fossilizing” them into opal. Opal is not a particularly hard stone so care must be taken to preserve the natural beauty of this gem . |
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PEARLOverview : Pearl is formed in shellfish as a reactant to an irritant such as a piece of sand. Cultured pearls are created by adding a piece of mussel or shell inside of an oyster of mussel. This then creates a pearl as layers of the inside of the shell grow over the added substance. The price of pearls vary widely as a result of luster, size, how they were grown, color and type. Natural pearls are the most expensive, followed by cultured pearls. Fresh water pearls tend to be relatively inexpensive. Pearl is a classic piece of jewelry. |
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PECTOLITEOverview: The name Pectolite comes from the Greek word 'Pectos' meaning 'well put together' in reference to the groups usually formed by the crystals of this mineral. Pectolite is quite a popular semi-precious stone. It occurs in white or colorless, gray, light yellow, light brown, light blue and light pink. Splinters of pectolite do not bend and are brittle. They are also sharp and can easily puncture the skin if not handled properly. |
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PERIDOTOverview: Peridot is among the oldest known gemstones.Peridot is a green gemstone that's sometimes called the evening emerald. Peridot is a gem-quality transparent variety of olivine, a mineral composed of magnesium-iron silicates. The peridot was regarded since ancient times as the symbol of the sun.Some of the finest peridot stones are called "evening emeralds" because they appear greener under artificial light. |
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PETALITEOverview: The name is derived from the Greek word 'Petalon' meaning ‘leaf’ and 'Lithos' meaning 'Stone'. This is a very unique gemstone that offers some beautiful pastel colors. Petalite is composed of Lithium, Aluminium, Silicon, and Oxygen. |
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PETRIFIED WOODOverview: Petrified wood is wood that has fossilized leaving a stone like replica of the original wood. Many people in southern Arkansas use light-colored petrified wood as flower-garden decoration pieces or borders. |
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PHENAKITEOverview: The name Phenakite is from the Greek word 'Phenakos' meaning "Deceiver". It is composed of Beryllium silicate. It is often associated with other gemstones including topaz, beryl (emerald), chrysoberyl and smoky quartz. Phenakite is quite a popular mineral for collectors, especially the twinned crystal forms. |
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PRASIOLITEOverview: Prasiolite is also known as Vermarine, and is quite simply Green Quartz. Prasiolite does not occur naturally. It is produced by heating Amethyst or Citrine from certain Brazilian localities. Prasiolite is sometimes confused with Green Beryl, Peridot and Tourmaline. |
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