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Fine Jewelry University (Show All FJU Articles)
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Gem in the Spotlight: Ruby
…ultrasonic cleaning machine with rubies, but use caution as these machines can cause loose gems to come out of their settings. Remember to dry your ruby jewelry thoroughly before wearing or storing. Why Ruby? Rubies are a truly remarkable … extremely durable 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 …
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Caring for and Cleaning Your Jewelry
… by things like hard toothbrushes and dirt (most dirt ranges 4-8 on the Mohs scale). Several different types of settings hold diamonds in the jewelry. From time to time gently touch the stone to see if it moves. If the stone moves, don’t wear… in a bowl on a clean table just in case the diamond becomes dislodged; you can find it easily. I have seen diamonds only held in the jewelry by dirt and grease. If you do the cleaning in a sink, take the precaution of plugging the drain …
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Gem in the Spotlight: Tanzanite
… a captivating mix of blue and purple. The deep hues of violet, indigo, and blue come together in an unrivaled blend only found in tanzanite. Yet, even with its rarity and dynamic look, tanzanite is still less in price than more commonly … in the future, further driving its desirability. Tanzanite is currently one of the rarest gemstones, and it is only found in one place on earth. In 2002 tanzanite was added as one of the birthstones for December alongside blue zircon, …
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Gem in the Spotlight: Spinel
…and we can see why. Its colors rival even the best rubies, sapphires, tourmalines, and other more popular gems. For only the 3rd time in the last one hundred years, the industry is modifying the official birthstone list. Spinel will be … which is one of 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 …
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Platinum
… by the following marks: 950 or PT950. The History of Platinum in Jewelry Platinum has been used in jewelry only since the 19th century. So platinum engagement rings are fairly recent. The Italian-French physician Julius Caesar Scaliger … Egyptians were the first to use it in jewelry, however, widespread knowledge of the white metal stretches back only a few hundred years. Despite being worked with some skill by South American Indians over 1000 years ago, it was not until…
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How to Sell Your Jewelry
…jewelry that is out of style can’t command premium price. In fact some styles are so out of favor that the jewelry’s only value is its intrinsic worth. The other extreme is that the jewelry could be antique. Antique jewelry is highly …jewelry. Damaged and broken jewelry many times justify the restoration costs but most of the time damaged jewelry is only valued at its intrinsic worth. Jewelry repair in many instances is counter-intuitive. I have seen jewelry that has …
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The Magic of Polarized Light
…These filters have a coating on them applied in such a way that all of the molecules are aligned with each other so only a certain vibrational direction of light can pass through. This means that all of the light that passes through a … photo quality. Some filters can even be rotated on the lens to selectively see through the surface of water or only capture the reflection. Modern 3D movies: Unlike old school red and blue 3D movies, modern 3D uses two images along with …
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Gem in the Spotlight: Pearl
…, and most natural pearls on the market today are antique. They can take years, even decades, to form, and are found only in a few select locations around the world. The process by which they are created is completely unpredictable, and …of June and is a favorite gem for weddings. Natural pearls have been discovered and cherished for hundreds of years. Only more recently have cultured pearl farming techniques been introduced that have made these incredible gems more …
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Synthetic Gems: The Whole Story
…made and can quickly be identified. Other synthetics are so well made it is impossible to id them in jewelry and can only be positively identified in gem labs with millions of dollars worth of equipment and world class personnel. … are very complex because there are different ways to make them. The inexpensive way to make the synthetic gems cost only a few dollars per carat and is generally easy to identify. But there are ways to make the synthetic gems that cost …
