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Fine Jewelry University Articles matching: “blue star sapphire”
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Fine Jewelry University
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Gem in the Spotlight: Quartz
… Bloodstone Green jasper dotted with bright red spots Carnelian Reddish orange chalcedony Gemology of Quartz Quartz is known for its durability with a Mohs hardness rating of 7 (harder than opal and peridot but softer than topaz or sapphire). This makes it a fairly hard 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 very well. All quartz has the same refractive index at…
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Gem in the Spotlight: Pearl
…French Polynesia. They are known for their dark, rich colors, which range from dark green and gray to deep shades of blue and black. Tahitian pearls are generally large with an average size of 9mm to 18mm, and they commonly have baroque …, loosen, and discolor over time. We recommend that you have your strand checked once a year. If the silk thread is starting to wear out, it’s best to have them restrung before it breaks. Pearl Vocabulary There is a lot to know when you …
