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Fine Jewelry University Articles matching: “2 carat emerald cut”
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Fine Jewelry University (Show All FJU Articles)
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Caring for and Cleaning Your Jewelry
… of all gems. In fact diamonds have been through a lot of stress before they reach you. The mining process and cutting tests the stone long before it reaches you. With conscious care, the diamond can last for generations just as … is related to the Mohs hardness scale. Diamond is the hardest at 10. Talc is listed as 1 the softest. Pure gold (24 karat) is Mohs 2.5, 14 and 18 karat list at Mohs 3. Platinum list at Mohs 4.33. Sterling silver list at Mohs 2.5. This…
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Measuring Gold Weight
…in the avoirdupois, troy, and apothecaries systems. Surprisingly it is identical in all three systems.” 4 grains = 1 carat; 24 grains =1 pennyweight; 480 grains = 1 troy ounce; 15.432 grains = 1 gram. “Although we have stated above that … them both to a uniform system. A gram or gramme is a standard metric unit of mass. An avoirdupois ounce converts to 28.34 grams approximately. The troy ounce is 31.1 approximately. You say, “Aha! Gold weigh more, so a pound of gold …
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Gem in the Spotlight: Garnet
…shape and color of pomegranate seeds. Garnet is really a group of gemstones. The pyrope, almandine and spessartite are the red – brown to orange sometimes with a tint of violet varieties. The grossular, demantoid and uvarovite are the Emerald green to yellow type. Garnets are beautiful and widely diverse gemstones
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Gem in the Spotlight: Tsavorite Garnet
… in East Africa in the 1960s changed the jewelry world. Here was a gem with the color to rival the most exquisite emeralds and the clarity of the cleanest sapphires, all with the time tested durability of garnet. Tsavorite is a unique form … stones are below two carats. By some estimates, Tsavorite is around 200 times rarer than the much better known Emerald. Gemology Tsavorite’s rarity and beautiful green color reminds one of the other green garnet called Demantoid. Demantoid…
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Gem in the Spotlight: Iolite
…a somewhat soft gem. It is comparable to quartz (Amethyst, Citrine, etc), a little harder than Opal, and softer than Emerald or Topaz. Because of this, some extra care should be taken with your iolite jewelry. Try to avoid wearing it in …, and the United States. In fact, the largest known iolite was found in Wyoming, weighing in at a whopping 24,000 carats (that’s over 10 pounds)! This commonality helps keep the price of iolite very affordable making it an excellent choice…
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Gem in the Spotlight: Topaz
… 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 … “Braganza Diamond” was thought to be the largest diamond ever found (prior to the Cullinan Diamond) at 1,680 carats and was set in the Portuguese crown jewels as such. It wasn’t until many years later that more modern testing identified …
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Gem in the Spotlight: Quartz
…quartz, others are exotic like Drusy Quartz. Some quartz material is a dollar per pound while others are $1,000+ per carat. Quartz is a gemstone with surprising variety. The most important reason for this variety is that quartz comes in 3 …uncut until 2009 due to the the difficulty of faceting such a large stone. Finished, this flawless gem weighs 20,200 carats (just under 9 pounds) and has dimensions of 200mm x 150mm. In 2012 the stone disappeared from the public eye due to…
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Gem in the Spotlight: Tanzanite
… 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 estimates are …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 was …
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Gem in the Spotlight: Amethyst
…, help hunters, guard against contagious diseases, and control evil thoughts. Amethyst was once as valuable as emeralds and rubies until very large deposits were found in multiple places around the world. Heavily increased supply dropped …Notable Stones One of the most famous amethyst stones is in The Morris Amethyst Brooch which is set with a large 96 carat heart shaped amethyst. It resides in the collection of the Smithsonian Institution, National Museum of Natural …
