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Fine Jewelry University Articles matching: “polishing jewelry”
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Fine Jewelry University (Show All FJU Articles)
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Gem in the Spotlight: Sapphire
… in deep blue. Fancy colored sapphires including pink, green, orange, and golden yellow are magnificent in any jewelry. See More on Etsy › With the exception of the diamond, which measures 10 on the Mohs scale, sapphire and ruby (9 on the … Mohs scale) are the toughest and most durable gemstones. This toughness makes the sapphire a long lasting piece of jewelry as well as a useful industrial tool. One last legend, the star sapphire has been called “the stone of destiny”; its …
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Gem in the Spotlight: Emerald
… day and it was later sold at Christies in 2011 for $6.6 million, setting the record for the most expensive emerald jewelry ever sold at auction. The Chalk Emerald is a famous 37.8 carat emerald known for its clarity and rich green color. It…can be susceptible to damage from heat, chemicals, and extreme temperature changes. It is essential to store emerald jewelry away from direct sunlight and avoid exposing them to household chemicals such as bleach and cleaning agents. …
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Gem in the Spotlight: Alexandrite
…said, because of natural alexandrite’s tremendous value and rarity, it is recommended to be worn carefully or put in jewelry such as earrings or pendants that are less prone to impacts than rings, for example. Alexandrite isn’t the only … in top-quality pieces by companies like Tiffany & Co. and Cartier brought it to the forefront of the high-end jewelry world where it has remained ever since. In its short history, alexandrite has set multiple records at auctions …
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Gem in the Spotlight: Ruby
… form of aluminum oxide with a Moh’s hardness of 9. This makes ruby one of the hardest gems commonly used in jewelry second only to diamond (which has a Moh’s hardness of 10) and moissanite (which is in between). Rubies only occur in the …treated to hide surface scratches or inclusion. Avoid using household chemicals or abrasives when wearing them. Ruby jewelry can be wiped with a soft, dry cloth often to remove dust and residue that will mar its sparkle. For more intense …
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Gem in the Spotlight: Blue Zircon
… gem. In fact, before any of the manmade diamond simulates were made, the colorless version of zircon was used in jewelry to mimic diamond. Why? Natural zircon is known for its scintillation, brilliance, and flashes of color or fire just …Zircon. Blue zircon was a specific favorite in Victorian times, when fine gems were often featured in English estate jewelry dating from the 1880s. Tiffany’s famous gemologist George Kunz was a distinguished zircon advocate. He proposed the …
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Is a Lab Grown Diamond Right for Me?
…are extremely rare and consequently very expensive). Lab-grown diamonds are new and exciting . To put it mildly, the jewelry industry has been around for a long time. It’s quite rare that something truly new comes around. Even though man-… diamond you decide on, Arden Jewelers has you covered with a selection of natural and lab grown diamonds, beautiful jewelry to set them in, honest and upfront descriptions of every product, and a proven track record of incredible prices. P…
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Fake Diamonds: The Great Diamond Attack
… are used in the manufacturing of tools like diamond tip drills. Synthetic diamond crystal big and pretty enough for jewelry has been made since the 1950’s. But, it just costs too much to justify using them. The technology is becoming more …you’re interested you can learn more about how to tell if a diamond is lab grown . Synthetic gems are not new to the jewelry profession. Synthetic colored stones have been around for over a 100 years. The impact was dramatic in the beginning…
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Measuring Gold Weight
The old riddle goes: what weighs more a pound of feathers or a pound of gold? Some say gold because it is heavier. Others say they are both a pound so they weigh the same. Both are wrong. How can this be? Tradition. Gold is not weighed in the ordinary weights. Gold is weighed in the troy measurement system. One ounce of gold is not the same as the ordinary ounce (really called avoirdupois ounce). The best way to understand this is to convert them both to a uniform system.
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Gem in the Spotlight: Opal
… index of 1.37 – 1.47 and a Mohs hardness of 5.5-6. This makes it one of the softest gemstones commonly used in jewelry. For reference, here are the Mohs hardness values for some other gemstones you may know: Diamond 10, Sapphire 9, Amethyst… 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 sandwiched between a piece of onyx and a clear piece of laboratory grown …
