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Fine Jewelry University (Show All FJU Articles)
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What Are Lab Grown Diamonds?
…, a very thin layer of synthetic diamond material is added on top of a CZ. The nanocrystalline diamond particles are only about 30 to 50 nanometer’s thick. That is about 30 to 50 atoms thick or 0.00003mm. Or, should it be said, extremely …. CVD diamond coated Cubic Zirconia are not synthetic diamonds. They are glorified Cubic Zirconia diamond simulants only. They do not have the same hardness or crystal structure of diamonds. Like some eye glasses, CVD diamond coated Cubic…
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The History of Diamond Cuts
One of the earliest recorded statements about diamonds is: “the substance that possesses the greatest value, not only among the precious stones, but of all human possessions.” said by Pliny, the Roman historian. The story of the … of a gem while polishing is making the facets smooth and shiny. Diamonds are cut and polished in one step. Since only diamond can cut diamond, the diamond cutter must take care to polish the gem at the same time. That is one of the … thin flat pieces of diamonds in the shape of an “M” in 1477. The Earliest Diamond Cuts Once it was understood that only diamond can cut diamond the process of changing the shape of a diamond began. In the 15th century cutters would saw …
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How Are Lab Grown Diamonds Made?
… the alchemists of old who sought to turn lead into gold, many have tried to achieve this impressive feat. We have only recently been able to produce gem quality, lab grown diamonds that are large enough to be used in jewelry. But, how is… with all of these advantages, the largest known, polished lab grown CVD diamond as of the time of this writing is only 3.23 carats; it was graded as I color and VS2 clarity. Intense research is ongoing around the world into the field of …
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How to Value Inherited Jewelry
… it was put out to market, the condition of the item, the photo in the ad, and a million more factors the seller may only find a buyer willing to pay $800. This does not change the jewelry value. It simply means that the current owner …Replacement Value The most popular jewelry appraisal is an insurance appraisal for replacement purpose. Many people only know of this one type of appraisal. It produces the highest price for jewelry value. It is a theoretical value based …
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Types of Necklace Chains
… to kink. Serviceability – They are probably the easiest chain style to maintain and repair. Keep in mind that this only applies to solid link cable chains. Hollow cable chains, like any hollow jewelry, are difficult to work on. CONS … have a big chain look without a big chain price. This is a very nice feature to have when gold prices are high. The only downside is that this style isn’t quite as strong as a traditional cable chain of the same size would be. PROS Cost…
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How to Tell If a Diamond Is Natural or Lab Grown
…, that’s a pretty good indication that it is lab grown. However, like any gemological test, the Type IIa test is only an indicator for the gemologist to use. There are lab grown diamonds that are not Type IIa, and there are natural … added benefit of knowing that your diamond was checked by an experienced, GIA trained gemologist. We are one of the only shops in Sacramento with a full gem lab at our disposal including the powerful DiaTrue tester. So, you can buy with …
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Gem in the Spotlight: Peridot
… called it the “gem of the sun”. It was believed that peridot could chase away evil spirits and dissolve curses but only when set in gold. Peridot is the birthstone for August. It is also the accepted anniversary gemstone for the 16th … green It was believed that Peridot could chase away evil spirits and break curses. Some legends added that this can only happen when it set in gold. Peridots were favored by pirates, considered powerful amulets against all evil, and when…
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Jewelry Repair FAQ
… are the key to understanding gold plating. The amount of gold used is on the molecular level. This means that only a very thin layer of gold covers the surface. Gold plating produces a layer of gold around 0.5 microns thick. A micron is …Electroplated. On the other hand, gold flashing (or washing) is thinner than standard gold plating. Gold flashing is only about 0.175 microns (or 0.000005 inches) thick. What is Rhodium Plating? Rhodium is a member of the Platinum family …
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Frequently Asked Question about Jewelry
… basically the same look and feel, just newer. I have worked with clients who have changed their wedding ring after only two years and others waited until over 50 years. The reasons to redesign range widely: the ring is worn out (it would…, added SI3 to its price list. For those who are unfamiliar with the Rap sheet, it is the definitive (but no longer only) price guide for Diamonds. It is used widely by the wholesale as well as retail industry. Some say the SI3 is a good …
