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Fine Jewelry University Articles matching: “Clear Quartz”

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Gem in the Spotlight: Aquamarine

FJU Category: Gemstones | Tags: Aquamarine, Birthstones, Colored Gemstones, Folklore, Gem Spotlight, Gemology

…. 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 brilliance of this …
Gem in the Spotlight: Spinel

FJU Category: Gemstones | Tags: Colored Gemstones, Folklore, Gem Spotlight, Gemology, Jewelry History, Spinel, Synthetic Gemstones

… like us. Spinel can be stored with other jewelry but like with all precious stones, it should be treated and stored with care. Its Mohs hardness of 8 puts it on par with Topaz. It’s softer than diamond or sapphire but harder than quartz, tourmaline, and peridot. With proper care there’s no reason why a piece of spinel jewelry can’t last for generations even becoming a treasured family heirloom. Why Spinel? Despite its long history spinel is relatively new to jewelry in …