Figure 1. These yellowish green kyanite rough crystals range from 1.4 to 5.1 grams, while the cushion cabochon weighs 4.84 ct. Photo by Don Mengason. At the Riverpark Inn show in Tucson, gem dealer ...

At a glance, bright blue kyanite from Nepal might be mistaken for sapphire, but they are easily identified by their different inclusions and optical values. An article by Ulrich Henn and Klaus ...

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