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In fact, when it comes to toughness, nephrite jade is the toughest known natural mineral, tougher even than ceramics and steel. “This explains why it was used in neolithic times for knife blades ...
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‘Unique’ jade-like pendant — 7,600 years old — discovered in Serbia. See the jewelryChemical analysis of the piece found it is actually made of nephrite, a mineral that is commonly used as “jade,” but different ... “A unique find in Serbia comes from the Early Bronze ...
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