Turquoise, Howlite, Magnesite
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BIR-04-01575 in stock4,25 грнNatural Turquoise Beads (strengthened) Xinjiang Turquoise is a high quality natural turquoise produced in China. The beads are made of solid stone (not pressed). Painted for color stability, because natural birch tends to "fade" over timeCount
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BIR-06-01Out of stock7,81 грнNatural Stone Beads Xinjiang Turquoise is a high quality natural turquoise that is mined in China. The beads are made of solid stone (not pressed). Painted for color stability, because natural birch tends to "fade" over time
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BIR-08-01Out of stock12,93 грнNatural Stone Beads Xinjiang Turquoise is a high quality natural turquoise produced in China. The beads are made of solid stone (not pressed). Painted for color stability, because natural birch tends to "fade" over time
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BIR-G-04-01257 in stock3,45 грнNatural stone beads Govlita size 4mm made in IndiaCount
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BIR-G-06-01265 in stock4,17 грнNatural stone beads Govlite size 6mm, made in IndiaCount
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BIR-G-08-01369 in stock5,74 грнNatural stone beads Govlite size 8mm made in IndiaCount
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BIR-G-10-01186 in stock7,58 грнNatural stone beads Govlita size 10mm, made in IndiaCount
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BIR-G-12-01108 in stock9,55 грнNatural stone beads Howlite size 12mmCount
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BIR-G-1813-0173 in stock24,38 грнLuxury natural howlite beads in the shape of a flattened drop size 18 * 13 mm made in IndiaCount
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BIR-I-06-04-UP4 in stock150,46 грн214,94 грнSynthetic Dyed Howlite BeadsCount
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BIR-I-10-01151 in stock2,22 грн3,17 грнSynthetic Howlite BeadsCount
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BIR-I-10-03-UP3 in stock205,83 грн294,05 грнHowlite imitation beadsCount
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BIR-I-10-0566 in stock3,56 грнHowlite beads, imitation, color - white with gray streaksCount
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BIR-I-10-05-UP3 in stock248,88 грн355,55 грнHowlite beads, imitation, color - white with gray streaksCount
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Turquoise (from Persian Firuza - "stone of happiness") - a mineral, hydrated phosphate of aluminum and copper, one of the most popular from ancient times to the present day ornamental and a semi-precious stone. Turquoise has always been a popular stone and was highly valued, it was and remains among the first ornamental stones. Its deposits are numerous, but their reserves are usually small, as a result of which the targeted extraction of natural raw materials is quite expensive. Deposits - Egypt, Sinai Peninsula, Iran, Afghanistan, Tajikistan, Uzbekistan, Turkmenistan, USA, Tanzania, Australia, Argentina. Similar to turquoise: chrysocolla, variscite and blue colored howlite .
80% of turquoise arrives on the world market fortified . To strengthen the natural stone, it is impregnated with resins, colored wax, supplemented with epoxy inserts. Collectors value such stones less, but for jewelry�� they are even preferable to socks - they are easier to sand and do not wear out or fade when worn.
Homogeneous composition, large pieces, too shiny surface - will indicate that this is a imitation , or an artificial analogue.
Very often turquoise is imitated by painting over howlite - light gray stone with veins or magnesite .
Synthetic turquoise is so close in chemical composition that it is enough to distinguish it complicated. Usually these are bright blue stones with veins - "cobwebs". This is the so-called "Viennese turquoise ". In terms of strength, density and appearance, synthetic turquoise is not inferior to the real one.
Govlite (caulite, turkvenite) is a mineral, calcium borosilicate. Mineral gray-whiteIt is colored with brown and black veins and a silky sheen. Sometimes howlite , in addition to cryptocrystalline masses, occurs in the form of small crystals that can be seen in ultraviolet light (crystals are highlighted in white). The color howlite is usually white or gray, often with minerals with brown and black veins. In ultraviolet light, tiny crystals howlite sometimes gleam with a yellowish or whitish light, tiny, barely visible to the naked eye. Howlite easily dyes in blue tones and therefore often acts as a substitute for turquoise. Imitation turns out to be so accurate that sometimes unscrupulous dealers deliberately give out painted howlite as real turquoise. From howlite beads, cabochons and even small figures are cut. Their polished surface shines like porcelain. Ch�Other deposits are located in Nova Scotia (Canada). There is howlite and in California. The natural color howlite is unattractive, so this mineral is widely used in jewelry artificially colored in blue-green tones, in the form of imitation under turquoise . Sometimes howlite is painted in red tones, imitating in this case corals.
Magnesite belongs to the calcite group and also crystallizes in trigonal symmetry. Magnesite crystals are simpler and less rich in variety of shapes compared to calcite, their color is grayish-white to light gray. Magnesite masses are opaque, have a typical porcelain-like appearance and a shell-like fracture. Sometimes they can have a loose earthy structure or represent microcrystalline granular accumulations. Massive magnesite is mined industrially in the areas of Piedmont, Alto Adida�E and Tuscany. Outside Italy, significant deposits of massive magnesite , where beautiful crystals are found, are located, among others, in Styria (Austria), Silesia (Poland) and on the island of Evia (Greece) .
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