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Fine Jewelry University Articles matching: “Halo emerald cut fing”
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The Difference Between White Gold and Platinum
… the alloying metals, which bleach the deep yellow of pure gold. Alloying also effects the second issue. Both pure gold and pure platinum are soft metals. In fact both 24 karat gold and .999 platinum can be scratched and dented with a fingernail. Nether gold or platinum in their pure state will hold a shine for long. All white gold jewelry and most platinum jewelry are alloyed. The alloying is also a hardening process for both metals. The hardeners used in platinum is …
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Understanding the Diamond Buying Game
… thousands of dollars different. It is a favorite trick of some diamond wholesalers to use GIA labs for very poorly cut diamonds. The general public knows GIA is a quality lab and mistakenly thinks the diamond is quality. The Dirty …00 carat H VS2 accurately graded diamonds from GIA labs can be worth thousands of dollars apart. How? One way is the cut of the diamond. Diamond one can be a nice cut (61.5%) and diamond two could be a very poor cut (68%). Another way is…
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Gem in the Spotlight: Opal
…: “For in them you shall see the living fire of the ruby, the glorious purple of the amethyst, the sea green of the emerald, all glittering together in an incredible mixture of light.” During the Middle Ages, opal gained an interesting … doublets, a lapidarist will use a piece of ironstone or black onyx and glue the fragile piece of opal to it before cutting and leaving them glued together after the fact to be set into jewelry. In triplets, that thin piece of opal is …
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Gem in the Spotlight: Jade
… 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 “Imperial Jade.” Jade is one of the top selling gems in Asia, but its beauty and cultural importance have landed it a spot as one of the most important items in the global gem market. …
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Gem in the Spotlight: Garnet
…shape and color of pomegranate seeds. Garnet is really a group of gemstones. The pyrope, almandine and spessartite are the red – brown to orange sometimes with a tint of violet varieties. The grossular, demantoid and uvarovite are the Emerald green to yellow type. Garnets are beautiful and widely diverse gemstones
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Gem in the Spotlight: Tsavorite Garnet
… in East Africa in the 1960s changed the jewelry world. Here was a gem with the color to rival the most exquisite emeralds and the clarity of the cleanest sapphires, all with the time tested durability of garnet. Tsavorite is a unique form … stones are below two carats. By some estimates, Tsavorite is around 200 times rarer than the much better known Emerald. Gemology Tsavorite’s rarity and beautiful green color reminds one of the other green garnet called Demantoid. Demantoid…
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Gem in the Spotlight: Topaz
… 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 gravity: 3.53 Mohs Hardness: 8 Care and Cleaning Even though it’s …
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Gem in the Spotlight: Iolite
…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 … be observed today. However, if you ever need to find north, I would recommend a different approach. Just use the finger that your iolite jewelry is worn on to open the compass app on your smart phone. From there you can find both …
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The Magic of Polarized Light
… are a few of the places you will find polarizing filters in everyday life: Sunglasses: Polarized sunglasses help cut through reflections in water and glass so that we can see easier. Camera lens/filters: Polarizing lens filters reduce … only allows one angle to pass through at a time. This helps confirm that a stone is doubly refractive and not just cut with unusual, doubled facet junctions. The Elegance of the Polariscope Another gemological tool that uses polarized …
