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Fine Jewelry University Articles matching: “S14k made in china”
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Fine Jewelry University (Show All FJU Articles)
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How Are Lab Grown Diamonds Made?
…was demonstrated. Henri Moissan was one of the early pioneers in the field. In 1893, he claimed to have successfully made a diamond by heating charcoal to 3,500 degrees Celsius inside a carbon crucible. Many attempts were made to … of deep volcano brings them up to where humans can find and mine them. The first successful synthetic diamonds were made by mimicking nature with High Pressure/High Temperature (HPHT) manufacturing. There are three basic manufacturing …
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Gem in the Spotlight: Jade
…Aztecs. They used it for medicinal purposes and carved it into jewelry and religious artifacts. When jadeite reached China for the first time in the 1700s, gem carving had already been a tradition for thousands of years. At that time, gem … desirable piece of material. Green nephrite is mined all over the globe, but the main producers are Northwestern China, British Columbia, and Siberia. Myanmar (Burma) and Guatemala are the primary sources of jadeite. Care and Cleaning of …
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Gem in the Spotlight: Pearl
… the South Sea pearls, Tahitian pearls, and Akoya pearls. Akoya pearls, grown in Akoya oysters found in Japan and China, were first introduced in the early 1900s and quickly became popular due to their high quality and consistency. …: Grown in freshwater mussels rather than saltwater oysters, they are typically produced in the rivers and lakes of China, the United States, and Europe. Because they can be grown in large quantities, freshwater pearls are generally less …
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Synthetic Gems: The Whole Story
… these gems. It took over a hundred years and millions of dollars of research to create what nature can produce. Man made gems come in many forms. Every thing from simple glass to plastic to high tech chemical tongue twister like …gemology we call this a synthetic gem. Synthetic gems are not bad, fakes, or the curse of a modern society. So a man made synthetic ruby has the same exact chemical formula and crystal structure and optical characteristics as a natural …
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What Are Lab Grown Diamonds?
In the simplest terms, lab grown diamonds are diamonds that have been made by people instead of mined out of the earth. If it’s so simple, you might wonder why there’s an entire article below… the key that unlocks this entire question. Synthetic can mean artificial or even fake. Synthetic can also mean man-made, copied, unreal, or even imitation. But, in this context, what do we mean when we say “synthetic diamond”? In the … misrepresentation has seriously confused what the term “synthetic” means, and it’s why most producers of man-made diamonds prefer the term “lab grown” over “synthetic.” In order to appreciate this fully, it helps to understand a little …
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Fake Diamonds: The Great Diamond Attack
… inertia testers) is the front line in finding diamond fakes or look a likes. Modern science has developed a man made gem that can fake out the standard diamond tester. Moissanite is lab-created, silicon carbide, and it gives a positive …, refractive index of 2.65, dispersion of 0.0104, and a specific gravity of 3.21. More creative uses of this man made gem are in the pipeline. The Big Bad Synthetic In the gem world we use words with particular meanings. Synthetic is one …
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Gem in the Spotlight: Quartz
… gems are important to a wide range of cultures, eras, and peoples. They are heralded in the Bible, Ancient Egypt, China, India, and many other civilizations. History is full of people who took power and comfort from one or another variety… banned its use when describing green quartz. The Macrocrystalline or Crystal Varieties of Quartz These gems are made of one, single crystal, and they include some of the most widely known and recognizable quartz species. If you were born…
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Brands and Designer Jewelry
… their followers expect. Style Jewelry styles must look good and be wearable. A particular piece may be very well made and last for years, but if it goes out of fashion, people won’t generally want to wear it. It is important that a … all over. You can also find un-branded jewelry that looks great on day one, but turns out to be very cheaply made. Some designers can become complacent and let their designs fall out of fashion. Sadly, there are no guarantees. But, in …
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Star White Gold
…. In addition, not all gas is created equally. We have all had the experience of poor performance due to poorly made gas. White gold also has three grades. Grade 3 is off white, grade 2 is standard, and grade 1 is premium. This means that… when they buy it. I have seen a yellow gold ring heavily plated to look white. This was a true 14 karat yellow gold made to look white and it worked for a while. What the white gold task force did is come up with the three grade levels …
