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Crystal City Underground

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Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Crystal City Underground
Phone:
+1 636-931-2888

Hours:
Sunday1pm - 5pm
MondayClosed
TuesdayClosed
WednesdayClosed
ThursdayClosed
Friday7pm - 12am
Saturday1pm - 12am


Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. It is typically blue, but natural fancy sapphires also occur in yellow, purple, orange, and green colors; parti sapphires show two or more colors. The only color that sapphire cannot be is red – as red colored corundum is called ruby, another corundum variety. Pink colored corundum may be either classified as ruby or sapphire depending on locale. Commonly, natural sapphires are cut and polished into gemstones and worn in jewelry. They also may be created synthetically in laboratories for industrial or decorative purposes in large crystal boules. Because of the remarkable hardness of sapphires – 9 on the Mohs scale – sapphires are also used in some non-ornamental applications, such as infrared optical components, high-durability windows, wristwatch crystals and movement bearings, and very thin electronic wafers, which are used as the insulating substrates of very special-purpose solid-state electronics . Sapphire is the birthstone for September and the gem of the 45th anniversary. A sapphire jubilee occurs after 65 years.
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