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Fine Jewelry University Articles matching: “Gtr 10k means”
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Fine Jewelry University (Show All FJU Articles)
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Gem in the Spotlight: Tourmaline
… the stone to be used in early sonar systems in the First World War as well as in extremely sensitive pressure gauges in submarines. History and Lore of Tourmaline The name tourmaline comes from the Singhalese word turamali, which means “mixed gems” owing to the fact that the gem can look like many others. Tourmaline was first discovered in 1554 in Brazil when Francisco Spinoza’s expedition confused its vibrant green with that of emerald. Thus began a long trend of …
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Gem in the Spotlight: Spinel
…generations even becoming a treasured family heirloom. Why Spinel? Despite its long history spinel is relatively new to jewelry in the sense that it is only recently getting attention on its own and not just imitating other gems. This means that the prices are still relatively low for a stone of this durability, rarity, and beauty. Spinel can be just as stunning as top-quality rubies at just a fraction of the price. Now that spinel is joining peridot as one of August’s …
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Star White Gold
…premium. 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 white gold is made, it can be yellowish to light yellow. When white gold rings are new they are coated with a white metal called rhodium. Rhodium is a metal very similar to platinum and rhodium shares many of the properties …
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Jewelry Repair FAQ
… containing chemically bound gold molecules and then using electricity to adhere those molecules to the jewelry’s surface. Molecules 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 roughly equal to 4/100,000 or 0.00004 inches. Gold plated jewelry is often indicated with a “GP” marking …
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What Are Lab Grown Diamonds?
… composition as a natural diamond. The same cannot be said of the many imitation or fake gems that are often, incorrectly, described as synthetic diamonds. This 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 bit about how lab grown diamonds are made. There are two techniques to grow …
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Gem in the Spotlight: Amethyst
… is roughly as hard as tourmaline, softer than sapphire and topaz, and harder than opal and tanzanite. This makes it a durable gemstone that is resistant to scratching and chipping. It is also resistant to heat and chemicals which means that it can withstand daily wear and tear. Amethyst has the same refractive index as other varieties of quartz at 1.54-1.55 and is doubly refractive. It has a vitreous polish luster and its specific gravity is 2.66. Its chemical …
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Gem in the Spotlight: Jade
… a “bi,” symbolizes heaven. Gemology of Jadeite and Nephrite Gemologically speaking, nephrite and jadeite are two different gems, with different refractive indices and chemical makeups. Both gems are silicates which basically just means that they are rocks. These particular rocks are made up of silicon and oxygen as the primary components, but the other elements are what make them special. The arrangement of these atoms in its crystal structure is what gives jade its …
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Art Deco vs. Art Nouveau Style Jewelry
… world into artistic design, emphasizing flowing lines, asymmetrical forms, and motifs inspired by plants, flowers, and the human form. Art Nouveau, also referred to as Jugendstil and Stile Liberty among many other monikers, simply means “New Art” and it impacted almost every artistic medium. Jewelry makers embraced materials such as enamel, horn, and semi-precious stones to create pieces that were not just adornments but works of art. Many Art Nouveau jewelry pieces …
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Learn Secret Diamond Buying Skills From a Professional Diamond Buyer
… enough for color grading. How can you to overcome the color assessment problem? Judging diamond color is actually looking for the absence of color or transparency (except in fancy color diamonds). A letter grade starting with “D” means totally transparent. The scale then moves down the alphabet to the next level of less transparency color. D to F are colorless grades, G-J are near colorless, K-M faint yellow on down the scale to more inner color. Colorless is also …
