Turquoise hardness is #5 to #6 on Mohs scale, and generally fair to good in toughness. Sources are China, Iran, and the US. Turquoise is one of the world’s most ancient gems. Archaeological excavations revealed that Egyptian royalty wore turquoise jewelry as early as 5500 BC, and Chinese artisans were carving it more than 3,000 …
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On Valentine's Dat 2014 I had my second bad experience buying diamonds and decided to do something about it. I thought there should be a way to calculate exactly how much a diamond is worth at a jewelry store vs. online jewelry store vs. Craigslist.
