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Loose Foiled Back Ruby Red Dark Color Corundum 7# Foiled Back Elongated cushion 12x10mm Gemstones Wholesale at factory direct price from China Suppliers and manufacturers. Picture What's Foil Backed gemstones？ Foil backing (or foiling) is a gemstone surface enhancement technique where a thin sheet of metal or other material (sometimes colored) is placed behind the gemstone in order to reflect more light, and/or color, back into the stone and then towards the viewer. Therefore, the foil acts both as a reflector and a coloring agent. Most foiled gemstones are set in closed backs to shield protect the foil from deterioration (and detection?). A thin metal foil placed behind a gemstone within a closed-back setting to improve its optical performance. Metallic foil improves the reflectivity of certain gemstones, whilst coloured foils act as colouring agents when placed behind colourless materials, such as paste and rock crystal. These stones were typically set in silver closed backs to shield the foil from deteriorating. The practice of foil-backing gemstones can be traced back to Minoan times (circa 2000 BC), however it is most closely associated with the Georgian and early Victorian periods. What kinds of gemstones can be foiled back? There're many kinds of gemstones can be foiled back. The cheapest ones are rhinestone and then Glass gemstones, crystal stones. And also Cubic Zirconia gemstones which is sparkling & brilliant. and Corundum gemstones, Spinel, Nano Crystal and many kinds of synthetic and natural gemstones can be folied /coated back. As you can see the pictures above. What is Corundum and What are its Basic Qualities? A: Corundum is an aluminum oxide that commonly forms hexagonal barrel-shaped prisms that taper at both ends or as thin tabular hexagonal plates. It has a hardness of 9 on the Mohs scale, making it one of the most...

Loose Cubic Zirconia Swiss Blue Oval Shape Faceted Cut 9x11mm stones CZ40 wholesale from China Manufacturer and Suppliers Pictures What is Cubic Zirconia? A: Cubic Zirconia (or CZ) is zirconium oxide (ZrO2 ), is widely synthesized for use as a diamond simulant and it is a lab made created stone with a specific gravity of between 5.6-6.00 and at about 8.5 hardness on Mohs scale, which is harder than most natural gems. Its refractive index is high at 2.15 - 2.18 (B-G interval) and its luster is very good. Its dispersion is very high at 0.058 - 0.066, exceeding that of diamond (0.044). Cubic Zirconia Gemstones is the best stimulant for the Real diamond, it's beautiful and brilliant for the Jewelry designs. At FU RONG GEMS, you can Buy White and Colored CZ Loose Cubic Zirconia Stones With Quality Grades A to Top Grade Quality AAAAA at Wholesale Direct Factory prices from the Real China Professional Manufacturer and Suppliers. How Loose Cubic Zirconia Quality is Determined? A: There are four main factors that help determine the quality or grade of cubic zirconia. These are carat (or carat weight), clarity, color, and cut. CZ stones are imitation diamonds or simulants and are measured in carat weight. Loose cubic zirconia stones are always heavier than real diamonds. This is because the materials that are used to create the stones are denser. Though loose cubic zirconia stones are generally colorless, many shades of colors can be added using trace elements during the manufacturing process. These colors might include lavender, peridot, pink, violet, champagne, aqua, citrine yellow, and others. Typically, transparent cubic zirconia will be the more valuable, high-end diamond imitation. Colored CZ stones are valued according to the rarity, evenness, and tone of their colors. Clarity, or clearness, of loose cubic zirconia is...

Loose Lab Grown Blue Sapphire Pulled Czochralski Blue sapphire baguette 5x2mm gemstones wholesale from china Suppliers and Manufacturer. PICTURES Baguette cut - Baguettes tend to have stepped facets, like emerald cut and Baguette Cut is one of the earliest and simplest cuts employed to give diamonds their perfect shapes. The cut of a diamond is an important determining aspect of its beauty and worth. In fact, it is the perfect cut of a diamond that helps to enhance its brilliance. Different kinds of cuts have been used over the years to give expensive gemstones, like diamond, a specific shape. What's Pulled Czochralski Blue Sapphire Gemstone? Flame fusion creates long, tear-shaped pieces ofsynthetic corundum.Consisting of a mix of aluminum oxide and chromium, would have yielded asynthetic ruby. Another melt process, theCzochralski process, uses radio waves to melt the aluminum oxide. A rod tipped with a seed crystal is inserted into the mixture and slowly rotated and pulled out, creating a column of sapphire. The lab created Blue Sapphire can also be created by flame fusion but the quality and resemblance of synthetic Blue Sapphire created byCzochralski Pulled processis considered to be the best and superior to all other lab created Blue Sapphire. As It follows the same process as natural Blue Sapphire is created make it the most superior among other Blue Sapphire. Natural Blue Sapphire are rare and over-valued. It is better to buy synthetic Blue Sapphire made by Pulled method as they have exact same chemical composition and physical composition and are sold at fraction of price of natural Blue Sapphire. They also appear brighter and more vivid than natural Blue Sapphire making it the better than corundum blue sapphire stones. Which gemstones can be grown in a lab? Diamond, fancy colored diamond, sapphire, ruby, spinel, emerald, alexandrite, moissanite,...

Loose Synthetic Aquamarine Spinel Aqua Blue Color #106 Elongated Cushion Shape Faceted Cut 12x10mm Gemstones wholesale from China Supplier and manufacturers. Pictures 106# blue color stones usually used as the simulated color of Aquamarine Color Gemstones. What's Synthetic Spinel? A: Although not as widely used today as synthetic Corundum, synthetic Spinel is still one of the most common man-made gem materials, particularly blue synthetic Spinel. It appears frequently in class rings and costume jewelry. Blue, green and other colors of synthetic Spinel are mostly manufactured using the inexpensive flame-fusion method by which the Spinel develops around an elongated boule. These flame-fusion Spinels can be distinguished from natural Spinels by a slightly elevated refractive index due to a chemical variation involving higher aluminum content. Blue Synthetic Spinels of the flame-fusion type are typically colored only by cobalt. No iron is added, and therefore they are diamagnetic, another property that distinguishes blue flame-fusion Spinels from blue natural Spinels. When viewed under the Chelsea filter and also under long wave UV light, the light blue and medium blue gems pictured below left and center show a pale pink reaction due to low cobalt content, while the dark blue gem on the right appears bright red due to much higher cobalt content. None of the synthetic Spinels shown below contain enough cobalt to cause magnetic attraction. Comparison of Spinel and Other gemstones: The Popular colors of Spinel Stones: 104#, 105# and 106# are the simulated colors of Aquamarine, 104#Light, 105# Medium and 106# dark. 107# 108# colors are the simulated colors of Topaz Sky blue, 120# is the simulated color of Topaz London Blue. 119# is the simulated color of Topaz Swiss Blue. 112#, 113#,114# are the simulated color of Sapphire blue. 149#(Light) and 152#(Dark) are the simulated color of Tourmaline Green Color stones....

Loose Synthetic Aquamarine Spinel Aqua Blue Color #106 Square Shape Princess Cut 4x4mm Gemstones wholesale from China Supplier and manufacturers. Pictures 106# blue color stones usually used as the simulated color of Aquamarine Color Gemstones. What's Synthetic Spinel? A: Although not as widely used today as synthetic Corundum, synthetic Spinel is still one of the most common man-made gem materials, particularly blue synthetic Spinel. It appears frequently in class rings and costume jewelry. Blue, green and other colors of synthetic Spinel are mostly manufactured using the inexpensive flame-fusion method by which the Spinel develops around an elongated boule. These flame-fusion Spinels can be distinguished from natural Spinels by a slightly elevated refractive index due to a chemical variation involving higher aluminum content. Blue Synthetic Spinels of the flame-fusion type are typically colored only by cobalt. No iron is added, and therefore they are diamagnetic, another property that distinguishes blue flame-fusion Spinels from blue natural Spinels. When viewed under the Chelsea filter and also under long wave UV light, the light blue and medium blue gems pictured below left and center show a pale pink reaction due to low cobalt content, while the dark blue gem on the right appears bright red due to much higher cobalt content. None of the synthetic Spinels shown below contain enough cobalt to cause magnetic attraction. Comparison of Spinel and Other gemstones: The Popular colors of Spinel Stones: 104#, 105# and 106# are the simulated colors of Aquamarine, 104#Light, 105# Medium and 106# dark. 107# 108# colors are the simulated colors of Topaz Sky blue, 120# is the simulated color of Topaz London Blue. 119# is the simulated color of Topaz Swiss Blue. 112#, 113#,114# are the simulated color of Sapphire blue. 149#(Light) and 152#(Dark) are the simulated color of Tourmaline Green Color stones. Click...

Lab Created Synthetic Spinel Tourmaline Green Light Color 149# SquareShape Princess Cut 4x4mm gemstones Wholesale at factory price from China Supplier and manufacturer PICTURES What's the lab created green tourmaline Gemstones? The material oflab created green tourmaline is the Spinel, green color spinel stones belongs to the Spinel Family stone. Lab created Green tourmaline are the Color Number 149# and the Dark Green 152# of Spinel. What's Green Tourmaline Gemstones? Green tourmaline is a type of green crystal and is part of the tourmaline family, which also features colors such as red, yellow, blue, colorless and even black. Green tourmaline is considered to be the most common tourmaline gemstone, and is considered the classic color of the gem. Green tourmaline stones feature a wide range of shades within the green color range. While some of these gemstones feature a darker bottle green color, others stones can range from a very light green to a yellowish green, or olive color. Certain green tourmaline stones feature a blue-green or darker green color. Green tourmaline featuring the blue-green colors are considered to be the most favored colors and are increasingly rare compared to other shades of the gemstone. In certain jewelry settings the green tourmaline gemstone can often appear similar to the green emerald stone. The stone features a very high clarity rating as a type 1 and also has a trigonal crystal structure. The green tourmaline is rated a 7.5 for hardness on the Mohs scale, which is considered to be a good level of hardness. This means the stone is resistant to scratches as well as other abrasions. Green tourmaline is considered to be lustrous and very refractive. The stone can be located in mines in Brazil, Pakistan, Madagascar, Afghanistan, Nigeria as well as across the United States of America. The...

Lab created Padparadscha#55 orange sapphire corundum baguetteShape Step Cut 2x4mm gemstonesWholesale from China Suppliers and manufacturers. Pictures What's PadparadschaOrange sapphire Gemstones? The Padparadscha sapphire is a rare but striking version of this gem that is pink- and orange-toned, offering a colorful alternative to the more well-known blue. September birthdays may especially enjoy the variety of choosing a padparadscha sapphire, as sapphire is the birthstone for September. Padparadshah Color is one of the rarest and most-prized fancy colored corundums in the world.Padparadshah is basically an orangish pink colored sapphire (corundum 55#). This rare color of the padparadshah sapphire is both from iron and chromium impurities. COLOR: Padparadscha is salmon-pink variety of CorundumCHEMICAL COMPOSITION: Al2O3 (Corundum) SPECIFIC GRAVITY: 3.95 – 4.10REFRACTIVE INDEX: 1.757 to 1.780 HARDNESS: 9 BIRTHSTONE: Padparadscha is the birthstone of September UNUSUAL PROPERTIES: Padparadscha Sapphires bring a vital energy to the emotions, allowing one to be more outgoing and dynamic, playful and full of joy. They allow one to better express their feelings to others. The Padparadscha’s pink color energy also stimulates the Heart Chakra located near the center of the breastbone. It regulates our interaction with the external world and controls what we embrace and what we resist. It gives us the balancing ability to be ourselves within the environment, and helps in our relationships. Sapphire is the September birthstone and for the 5th and 45th anniversary gemstone gifts. For specific birthstone information, September birthstone, Sapphire, jewelrycentral.com. Sapphire comes in all colors except red! It may be colorless, a deep blue, green, golden yellow, pink, reddish-orang, and violet. The most valuable color of sapphire is referred to as "corn-flower blue;" black, grey, or green overtones to this vivid blue will reduce overall value. Blue sapphire is not as expensive as diamond, emerald, and ruby, with the exception of...

Loose Synthetic Lab Created Corundum Rose Pink sapphire 3# Marquise Shape Faceted Cut 7x3.5mm Loose gemstones Wholesale from China Suppliers and manufacturers. --Also Called as Synthetic Pink Sapphire,Lab created Pink Sapphire.--We Supply and Manufacture Corundum Pink sapphire stones in All kinds of popular Shapes and Sizes;--Color Shades:Pink sapphire 2# (Medium), Rose Pink sapphire 3# (Dark), Pictures What's the Pink Sapphire Color Stone? The Lab Created Pink Sapphires are the family stones of Synthetic Corundums. Lab Created Pink Sapphires are made by a method called Flame Fusion.They are made in such a way that they look like Natural gemstones. These Lab Created gemstones have the same chemical properties of the real stone,Have the same hardness, density and appearance like the Natural Pink Sapphire. Only a trained eye can tell the difference between the two. The most common Corundum colors are Blue Sapphire and Ruby color stones, but we can also supply White Sapphire, Orange Sapphire, Yellow Sapphire and Alexandrites in all shapes and sizes. We have quite a collection of Pink Sapphire Color Loose gemstones such as popular Round Brilliant Cut,Princess Cut,Emerald Cut,Cushion Cut and also unique heart, Oval,Octagon,Marquise, Pear,Star Cuts and Much More... What is Corundum and What are its Basic Qualities? A: Corundum is an aluminum oxide that commonly forms hexagonal barrel-shaped prisms that taper at both ends or as thin tabular hexagonal plates. It has a hardness of 9 on the Mohs scale, making it one of the most durable commercial gemstones. It has no dominant cleavage and fractures in a conchoidal manner. A high density of ~4.0 g/cm3 (most silicate minerals are ~2.6 g/cm3) results in corundum occurring in secondary placer deposits and recoverable by panning methods, similar to how you would recover placer gold. Corundum comes in all colours of the rainbow but is most commonly...

Loose Synthetic Lab Created Corundum Pink sapphire 2# Octagon Shape Princess Cut 6x4mm Radiant Loose gemstones Wholesale from China Suppliers and manufacturers. --Also Called as Synthetic Pink Sapphire,Lab created Pink Sapphire.--We Supply and Manufacture Corundum Pink sapphire stones in All kinds of popular Shapes and Sizes;--Color Shades:Pink sapphire 2# (Medium), Rose Pink sapphire 3# (Dark), Pictures Radiant cut: also Called as Octagon Cut with Cut Corner The radiant cut (Octagon princess cut) is a beautiful combination of the classic emerald cut and the sparkle of the round brilliant. The radiant cut is similar to the princess cut but is usually (though not always) a more rectangular outline and has blocked corners like those of an emerald cut. The cutting is a combination of the step-cutting of the emerald-cut diamond with some triangular faceting of the brilliant cut. The radiant cut is dramatic as a solitaire but also looks great paired with side stones such as baguettes, trillions, or princess shapes. A Radiant cut stone should be set with special prongs to hold the blocked corners securely. What's the Pink Sapphire Color Stone? The Lab Created Pink Sapphires are the family stones of Synthetic Corundums. Lab Created Pink Sapphires are made by a method called Flame Fusion.They are made in such a way that they look like Natural gemstones. These Lab Created gemstones have the same chemical properties of the real stone,Have the same hardness, density and appearance like the Natural Pink Sapphire. Only a trained eye can tell the difference between the two. The most common Corundum colors are Blue Sapphire and Ruby color stones, but we can also supply White Sapphire, Orange Sapphire, Yellow Sapphire and Alexandrites in all shapes and sizes. We have quite a collection of Pink Sapphire Color Loose gemstones such as popular Round Brilliant Cut,Princess...

Loose Blue Spinel #119 Swiss blue color Octagon Shape Emerald Cut 11x9mm Gemstones wholesale from China Supplier and manufacturers. Pictures 119# blue color stones are usually used as the simulated color of TopazSwiss blue stones. when you're looking for a cheaper alternative blue Topaz Swiss blue gemstones, Spinel 119# blue color is one of best choice. What's Synthetic Spinel? A: Although not as widely used today as synthetic Corundum, synthetic Spinel is still one of the most common man-made gem materials, particularly blue synthetic Spinel. It appears frequently in class rings and costume jewelry. Blue, green and other colors of synthetic Spinel are mostly manufactured using the inexpensive flame-fusion method by which the Spinel develops around an elongated boule. These flame-fusion Spinels can be distinguished from natural Spinels by a slightly elevated refractive index due to a chemical variation involving higher aluminum content. Blue Synthetic Spinels of the flame-fusion type are typically colored only by cobalt. No iron is added, and therefore they are diamagnetic, another property that distinguishes blue flame-fusion Spinels from blue natural Spinels. When viewed under the Chelsea filter and also under long wave UV light, the light blue and medium blue gems pictured below left and center show a pale pink reaction due to low cobalt content, while the dark blue gem on the right appears bright red due to much higher cobalt content. None of the synthetic Spinels shown below contain enough cobalt to cause magnetic attraction. Comparision of Spinel and Other gemstones: The Popular colors of Spinel Stones: 104#, 105# and 106# are the simulated colors of Aquamarine, 104#Light, 105# Medium and 106# dark. 107# 108# colors are the simulated colors of Topaz Sky blue, 120# is the simulated color of Topaz London Blue. 119# is the simulated color of Topaz Swiss Blue. 112#,...