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Fine Jewelry University Articles matching: “Antique hallmark number 2”
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Fine Jewelry University (Show All FJU Articles)
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How to Value Inherited Jewelry
…is missing, then the equitable division of the jewelry is in doubt. Like most products, jewelry value is not one set number. It changes with the situation (who is buying, and who is selling) and the marketplace (global economy, commodity … a new jewelry item like the piece would cost. As a classic example, under a replacement price standard of value a 2000 model year Toyota Camry car would be valued at the current price of a brand new Toyota Camry. Of course, there is …
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Jewelry Repair FAQ
… of jewelry you love can look just the way it used to again. What is retipping, and why do I need it? In a large number of jewelry pieces, the valuable diamonds and gemstones are held in place with prongs. With wear, the tops of these … marking stamped somewhere on the piece. Heavy Gold Electroplating is gold plating with a minimum thickness of 2.5 microns. Look for an “HGE” stamped on the jewelry to indicate that it is Heavy Gold Electroplated. On the other hand, go…
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The Magic of Polarized Light
… is to help identify doubly refractive stones. When using a refractometer, a circular polarizing 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 narrow down the list of possible candidates of what the stone could be. A great example of this phenomenon can be seen when looking at the …
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Diamond Buying Guide: The 4 C’s
… birthmarks and useful as identifying characteristics. Clarity grading is done with 10 power magnification. The number, size, type, and location of inclusions determine the grade. The fewer inclusions, the more valuable the diamond. Grade … FL Flawless No blemishes or inclusions IF Internally Flawless No inclusions, only insignificant blemishes VVS1-VVS2 Very, very slightly included Minute inclusions difficult to see VS1-VS2 Very slightly included Minor inclusions …
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The Birthstones
… in gold. Care should be taken to protect peridot from scratches, sharp blows, household chemicals and extreme temperature changes. Do not use a home ultrasonic machine for cleaning. Spinel was added as one of August’s birthstones in 2016, and we think it’s a great addition. Spinel is a beautiful gem that comes in virtually every color you can imagine. It has good hardness and durability making it suitable for regular wear and its brilliance is on par with even the …
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Gem in the Spotlight: Alexandrite
… even ruby, alexandrite has been known around the world as one of the most sought-after gems for the better part of 200 years. But, what makes this stone so special? Gemology of Alexandrite Alexandrite is the extremely rare, color-…where it has remained ever since. In its short history, alexandrite has set multiple records at auctions including a 21-carat gemstone selling for 1.49 million dollars which works out to over $70,000 per carat! Alexandrite is said to …
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Gem in the Spotlight: Quartz
… refractive index at 1.54-1.55 and is doubly refractive. It has a vitreous polish luster and its specific gravity is 2.66 (may vary based on inclusions). In addition to its beauty, quartz is also an extremely useful stone due to its … likewise, when induced with an electrical charge, the crystal will vibrate at a very precise interval of exactly 32,768 vibrations/second or ~32kHz. This property is utilized in various electronic devices such as quartz watches and …
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Gem in the Spotlight: Tsavorite Garnet
… sizes larger than five carats, and most faceted 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 … in Russia. Tsavorite is 7.5 on the Mohs scale. It is a green grossular garnet with a chemical make-up of CA 3 Al 2 (SiO 4 ) 3 . It has a Refractive Index (RI) of 1.740 and a dispersion index of 0.028. So how did Tsavorite come to be …
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Types of Necklace Chains
… style of chain is both a beautiful piece of jewelry and a form of currency. Traditionally made in high karat gold (22-24k), the baht chain has been used as both an investment and a means of trade. The Baht is the official currency in …
