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Fine Jewelry University Articles matching: “Sterling silver sapphire”
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Fine Jewelry University (Show All FJU Articles)
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What to Do When Your Ring Irritates Your Skin
…. The Nickel is what makes the gold white, but it can also cause an allergic reaction. Some people are allergic to silver and we have even known someone to be allergic to pure gold (yes, it’s possible ). Determining the exact cause and …it. This isn’t an allergic reaction but a simple discoloration on top of the skin from the metal. Also, tarnish from silver jewelry can rub off and leave a blackish residue. In both cases, the color will easily wipe or wash off. You can …
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How to Sell Your Jewelry
… and 18 karat is 18/24 or .750 gold. Platinum most of the time is 90% pure and 10% alloy. Silver jewelry is usually sterling, which is .925 pure. The three units of weight used with precious metals are troy ounces, pennyweights, and grams. …. Damaged beyond repair jewelry is bought at its intrinsic worth. The intrinsic value is the metal (gold, platinum, silver) price plus any gems. The refining process used to recover the metal utilizes strong chemicals and has strict …
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Gold Purity and The Differences Between White and Yellow Gold
… 13.5k to be stamped 14k so the 14KP tells the consumer that this is a true 14 karat mix. White Gold Can there be other colors of gold engagement rings? Yes, Gold is yellow metal but adding copper to gold makes it redder and adding silver, zinc and any other metal makes gold paler. The white color is achieved by a careful choice of the alloying metals, which bleach the deep yellow of pure gold. It is interesting to note that white gold for engagement ring and wedding …
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Platinum
… metal in the rivers of Equador. Not realizing its superb qualities, they named it contemptuously platina (little silver) and threw it back into the river to ripen into silver. In 1912 white gold was “invented” in Pforzheim, Germany, as a …
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Types of Jewelry Clasps
… loosen and need to be adjusted. Also, like box clasps, this loosening happens much faster with softer metals like sterling silver. Adjustability – The bracelet needs to match your wrist size closely. Sometimes a second bar can be added to … – The tongue (insert) can become loose over time and will need to be adjusted. If the tongue is made out of silver this can happen quite quickly. Serviceability – If a box clasp does break, it can be difficult to find replacement parts …
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Art Deco vs. Art Nouveau Style Jewelry
…. Precious metals like platinum and white gold alongside rare and valuable gemstones such as diamonds, emeralds, and sapphires, were the materials of choice for Art Deco jewelry makers. The most prevalent diamond cut found in Art Deco jewelry…stones to create pieces that were not just adornments but works of art. Many Art Nouveau jewelry pieces were made in silver, but white gold and platinum were quite common as well. The diamonds used in Art Nouveau jewelry were typically Old …
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Gem in the Spotlight: Aquamarine
… in shades of blue-green. Aquamarine has a refractive index of 1.577 to 1.583 and is doubly refractive. Aquamarine’s specific gravity is 2.72 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 be taken to ensure that the stone is not damaged. Caring For and Cleaning Aquamarine To maintain the …
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Gem in the Spotlight: Topaz
… preference. Topaz itself is a hard gemstone with a Mohs hardness of 8. Mohs hardness is a standardized metric of how difficult it is to scratch something. For reference, topaz is a bit softer than diamond which is a 10 and corundum (sapphire/ruby) which is a 9 on the scale. It is a bit harder than emerald at 7.5-8 and quartz which comes in at 7. Here are some more gemological stats for reference: Refractive index: 1.619 to 1.627 Birefringence: 0.008 to 0.010 Specific …
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Gem in the Spotlight: Tanzanite
…, even with its rarity and dynamic look, tanzanite is still less in price than more commonly known gems like rubies, sapphires, and emeralds. Gemology of Tanzanite Gemologists refer to this gem as blue zoisite. The vast majority (current … its color. Tanzanite has a Moh’s hardness of 6-7, making it about the same hardness as quartz, softer than ruby, sapphire and emerald and hard than opal. Tanzanite has a refractive index of 1.69-1.70. History and Lore of Tanzanite Tanzanite …
