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Fine Jewelry University Articles matching: “Pink terms line”
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Fine Jewelry University
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The Magic of Polarized Light
…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 … filter is fitted over the magnifier. When twisted, if the stone is doubly refractive, the refractive index line will jump from one number to the next. Once you know if a stone is doubly refractive or not you can use that information to …
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Types of Jewelry Clasps
… is broken. Fold Over Clasp The fold over clasp is an elegant design that allows for very easy operation and streamlined aesthetics. A hinged tab is threaded through an opening and then closed tight. Tension in the metal tab holds the …) on one end and bar on the other that is slightly longer than the diameter of the circle. The bar is folded in line with the chain to thread it through the circle and then allowed to swing out to catch the edges of the circle. It is a …
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Gem in the Spotlight: Jade
…can be carved, and can be taken to a high polish. Nephrite is commonly found in a darker olive green color but can also be very light green, orangey-red, black, and yellowish green. Jadeite can come in many different colors including pink, purple (often called lavender jade), blue, black, white, and the most valuable/desirable color: a vibrant green. The finest of all green jadeite colors is a saturated emerald green that is almost transparent, and it is called “…
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Gem in the Spotlight: Opal
… to have a black body color. A gemologist with right training and equipment will be able to detect this treatment. Opals can also sometimes be dyed, giving them an unnatural but fascinating body color such as a vibrant green or pink. Some opals that have cracked can sometimes be reused by making “mosaic opals” gluing smaller broken pieces of opal together in something similar to stained glass windows. This is also a good time to discuss doublet and triplet opals. These …
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Gem in the Spotlight: Quartz
… surprising variety. The most important reason for this variety is that quartz comes in 3 main forms: macrocrystalline, microcrystalline and cryptocrystalline. Within each of these broad categories, the different colors of the gemstone … of the US Federal Trade Commission which effectively banned its use when describing green quartz. The Macrocrystalline or Crystal Varieties of Quartz These gems are made of one, single crystal, and they include some of the most widely …
