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Fine Jewelry University Articles matching: “rt mark”
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Platinum
… of the metal and none of its volume is lost. In addition to its strength and density, platinum has another remarkable quality – pliability. Platinum is a symbol of true love, purity, rarity and strength. These qualities of platinum are … white luster. This helps to reflect the true radiance of diamonds. In the United States platinum is usually marked: PT or PLAT. In Europe, platinum is identified by the following marks: 950 or PT950. The History of Platinum in Jewelry …
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Fake Diamonds: The Great Diamond Attack
… to justify using them. The technology is becoming more cost effective, and some synthetic diamonds are entering the market place now. Since they are the same chemistry as natural diamond, there is no easy test to use to separate them … diamond suppliers have sophisticated equipment in place to help them catch these impostors before they reach the marketplace. If you’re interested you can learn more about how to tell if a diamond is lab grown . Synthetic gems are not …
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The History of Diamond Cuts
… but did not have the technology to change their shape. So, the Romans wore uncut diamonds. One of diamond’s remarkable attributes is that the natural diamond crystal is beautiful without any human modification. Diamonds normally form in … or almost the same diamond cut can be known by different names. This is done in the modern era is for branding and marketing reasons to increase the perceived value of the diamond. In historical times, it was most likely for national and…
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Gem in the Spotlight: Tanzanite
… amount of blue in a tanzanite is caused by the quantity of vanadium present. Raw, unheated tanzanite is sometimes marketed as “mermaid tanzanite” because of the iridescent blue and green colors. You can usually tell if a tanzanite has …VP of Tiffany & Co. at the time, who named the stone tanzanite after the country of origin. Tiffany then started marketing the stone around 1968. The geological conditions required to form tanzanite are quite rare, leading some …
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Gem in the Spotlight: Pearl
…. Natural pearls grow in the wild without human intervention. They are very rare, 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… who believed it to be a talisman of good luck. Types of Pearls There is a huge variety of pearls available on the market today. This section will give you just a small sampling of the different kinds of pearls that you may run into. …
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Jewelry Repair FAQ
…. A micron is roughly equal to 4/100,000 or 0.00004 inches. Gold plated jewelry is often indicated with a “GP” marking stamped somewhere on the piece. Heavy Gold Electroplating is gold plating with a minimum thickness of 2.5 microns. Look…make gold jewelry, we mix pure gold with other metals to create different alloys that have different colors and properties. Because silver is naturally a white metal, many people believe it is mixed with pure gold to create white gold. …
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Gem in the Spotlight: Aquamarine
…, the finest specimens being the deepest in color. Most aquamarine stones have a subtle green component, and in some markets, a deep greenish blue is the most desirable. Brazil is the most prolific supplier of aquamarine where it is often…72 and it has a Mohs hardness of 7.5-8.0. For comparison, this means that it is softer than Sapphire, harder than Quartz, and similar to Topaz. This makes it a very durable stone that is suitable for regular wear. But, care should still…
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Gold Purity and The Differences Between White and Yellow Gold
…with gold. A plated piece of jewelry has a thin layer of gold over a base or non gold metal. Some plated jewelry has markings that look like real solid gold. For example, a plated piece can be stamped: 14k HGE or 18k GE. HGE means …. You can learn more about gold plating on our FAQ page. Sometimes engagement rings are stamped 14KP. The 14KP is a marking for plum gold which is a true mix of 14 karat gold. Some governments allow 13.5k to be stamped 14k so the 14KP …
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Understanding the Diamond Buying Game
… with the same standard. GIA and AGS use the most technical standards. EGL uses a looser grading standard, I call market grading. In addition, EGL has a franchise like business model and different EGL labs grade wildly different. Some … standard but in reality this is not always the case. Today, to make the grading standard more uniform, diamond certification by grading laboratories is thought to make diamonds a commodity. Again the dream is not the reality. The …
