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Fine Jewelry University Articles matching: “RPG 925 sapphire”
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Fine Jewelry University (Show All FJU Articles)
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Jewelry Repair FAQ
… way it did before a gemstone fell out; who wouldn’t? That’s why we have literally 100s of carats of loose diamonds, sapphires, rubies, opals, pearls, and more in all shapes and sizes to choose from when selecting a replacement stone for …by the jeweler’s torch. However, with our laser welder we are able to retip prongs next to many gemstones (diamonds, sapphires, and rubies for example) without removing them, saving you time and money. Can my costume and fashion jewelry be …
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How Are Lab Grown Diamonds Made?
…quest continued. Diamonds are a crystalline form of carbon, and so making artificial carbon crystal was the problem of lab grown diamonds. For decades, manufacturers of synthetic gemstones tried growing diamonds like they grew rubies, sapphires, and emeralds. It failed. Then they had the idea to grow diamonds in the lab like they grew in nature. High Pressure High Temperature Diamonds How does nature form diamond crystals? Nature does it very deep underground. Diamond …
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Art Deco vs. Art Nouveau Style Jewelry
…Art Deco jewelry design embraced symmetry, bold colors, and streamlined forms influenced by Cubism and the Machine Age. Precious metals like platinum and white gold alongside rare and valuable gemstones such as diamonds, emeralds, and sapphires, were the materials of choice for Art Deco jewelry makers. The most prevalent diamond cut found in Art Deco jewelry is the Old European cut, but some pieces still incorporated Old Mine cuts or transitional cuts. Design Principles Art…
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Gem in the Spotlight: Ruby
… arguably the richest history of all gemstones. Gemology of Ruby Rubies are in the corundum gem family along with sapphires. Corundum is an extremely durable form of aluminum oxide with a Moh’s hardness of 9. This makes ruby one of the … from trace amounts of chromium in the crystal structure. If they are too purple or too pink, they are called purple sapphires or pink sapphires, respectively. Since sapphires and rubies are the same gem material, they also share a refractive…
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Alternative Metals for Men’s Jewelry
… 6,191 degrees Fahrenheit. Tungsten is rated at about a 9 on the Mohs scale of hardness which is the same as Ruby or Sapphire and just below diamond (which is 10). Like these gems, tungsten is very scratch resistant and will not bend out of …come in around 7-8 on the Mohs hardness scale which is about the same as quartz or topaz but softer than tungsten or sapphire. Like most alternative metals, cobalt chrome bands are hypoallergenic and biocompatible. But, in our experience, …
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Gem in the Spotlight: Aquamarine
… in shades of blue-green. Aquamarine has a refractive index of 1.577 to 1.583 and is doubly refractive. Aquamarine’s specific gravity is 2.72 and it has a Mohs hardness of 7.5-8.0. For comparison, this means that it is softer than Sapphire, harder than Quartz, and similar to Topaz. This makes it a very durable stone that is suitable for regular wear. But, care should still be taken to ensure that the stone is not damaged. Caring For and Cleaning Aquamarine To maintain the …
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Gem in the Spotlight: Topaz
… preference. Topaz itself is a hard gemstone with a Mohs hardness of 8. Mohs hardness is a standardized metric of how difficult it is to scratch something. For reference, topaz is a bit softer than diamond which is a 10 and corundum (sapphire/ruby) which is a 9 on the scale. It is a bit harder than emerald at 7.5-8 and quartz which comes in at 7. Here are some more gemological stats for reference: Refractive index: 1.619 to 1.627 Birefringence: 0.008 to 0.010 Specific …
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Gem in the Spotlight: Tanzanite
…, even with its rarity and dynamic look, tanzanite is still less in price than more commonly known gems like rubies, sapphires, and emeralds. Gemology of Tanzanite Gemologists refer to this gem as blue zoisite. The vast majority (current … its color. Tanzanite has a Moh’s hardness of 6-7, making it about the same hardness as quartz, softer than ruby, sapphire and emerald and hard than opal. Tanzanite has a refractive index of 1.69-1.70. History and Lore of Tanzanite Tanzanite …
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The Magic of Polarized Light
…gemstones, due to their unique chemical structure, actually polarize light themselves. These gems are doubly refractive (DR) and they will split incoming light in multiple directions. Some common examples of doubly refractive gems are sapphire, tourmaline, and moissanite. These are contrasted with singly refractive (SR) gems like diamond that only bend light in one direction. Gemologists use the term birefringence to refer to how doubly refractive a particular gem is. By …
