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Old 08-12-2018, 06:41 AM   #1883
Bruno
 
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Join Date: Sep 2004
Location: Canada
Default Re: Real-Life Weirdness

Historically, people identified gems basically by the color, opacity, and loosely by the hardness, because they didn't understand the chemistry or optics. Which is why all the corundum species have their own names.
If it was a nice red, clear, and pretty hard, it was ruby.
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