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Fine Jewelry University Articles matching: “Green Phantom Quartz”
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Fine Jewelry University (Show All FJU Articles)
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Gem in the Spotlight: Aquamarine
… 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 …very pale blue to a deep blue, the finest specimens being the deepest in color. Most aquamarine stones have a subtle green component, and in some markets, a deep greenish blue is the most desirable. Brazil is the most prolific supplier of …
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Gem in the Spotlight: Tourmaline
…: is red, pinkish red, orangy red, or pink tourmaline. Indicolite: is dark blue, dark violetish blue, or dark greenish blue tourmaline. Paraíba: is a copper colored blue, intense violetish blue, or greenish blue tourmaline from Paraíba, …chrome tourmaline’s color actually comes from vanadium. Watermelon: This variant of tourmaline has a pink center and green edges that resembles a watermelon. Crystals of this type are often cut in slices to display this unique property. …
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Gem in the Spotlight: Topaz
… 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 … shades is available from light Sky Blue to dark London Blue. Topaz is also found in less commonly known colors like green, pink, and purple. Imperial Topaz is by far the most valuable variety, while colorless topaz is often the least …
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Gem in the Spotlight: Alexandrite
… Alexandrite is the extremely rare, color-change variety of a gem species called Chrysoberyl. It appears bluish-green in daylight, fluorescent light, and some LED light. Under incandescent light, candle, and firelight, alexandrite appears … interacts with alexandrite’s crystal structure. It absorbs most wavelengths of light very well, only transmitting green and red light. This means that depending on the light source the stone will reflect more of the accent colors of light…
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Synthetic Gems: The Whole Story
… made silicon carbide. In gemology, any material used to look like a gem is called a simulant. So clear glass, rock quartz, GGG, and Moissanite are all diamond simulants. They look like diamonds, but they are not diamonds. These simulants … millions of dollars worth of equipment and world class personnel. Synthetic diamonds on the high end and synthetic quartz on the low end are both very difficult to positively identify as synthetic. Both, I feel, are impossible to identify …
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Alternative Metals for Men’s Jewelry
…. As a frame of reference, cobalt rings 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 … for low grade pieces with more nickel Cobalt Looks like white gold or platinum, hypoallergenic Cut in 2 places 7-8, quartz or topaz Scratches more easily than others Carbon Fiber Light weight, modern look Cut NA Can feel “too light” …
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Gem in the Spotlight: Spinel
… with care. Its Mohs hardness of 8 puts it on par with Topaz. It’s softer than diamond or sapphire but harder than quartz, tourmaline, and peridot. With proper care there’s no reason why a piece of spinel jewelry can’t last for generations … the reasons why the August birthstone change is so exciting. Before, August babies were left with only the vibrant green of peridot, but now the entire color pallet has been opened up. Spinel is arguably the most overlooked and …
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What to Do When Your Ring Irritates Your Skin
… can begin hours or even days after contact and may last for several weeks. Some people’s skin even turns black or green when they wear certain jewelry. One of the most common metal allergies is Nickel which is added to pure gold in many … necessarily allergies. For example, copper or metals that contain copper (like bronze) can cause the skin to turn green where the metal comes in contact with it. This isn’t an allergic reaction but a simple discoloration on top of the …
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Gem in the Spotlight: Iolite
…iolite cannot be heat treated to enhance its color. The color you see is the natural color of the stone when it was first discovered. Coming in at 7 to 7.5 on the Mohs hardness scale, iolite is a somewhat soft gem. It is comparable to quartz (Amethyst, Citrine, etc), a little harder than Opal, and softer than Emerald or Topaz. Because of this, some extra care should be taken with your iolite jewelry. Try to avoid wearing it in situations where it might be hit against hard…
