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Need help identifying a blue sapphire. pics available

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I have a 19 ct stone I believe may be blue sapphire, I need a littlr help identifying. It has a weight of 3.79 grams, and displaced 0.9 or 0.98 cc's of water. There is a light feathery looking inclusion on the right corner of the stone if zoomed in you can see. The stone also shows very minor magnetics when placing the gem on a floating piece of foam. Please help me get an idea if this may be a true sapphire. The ring the stone is set in is a 10kt gold homemade ring,

asked Dec 7, 2015 by Duude Whiting (190 points)
edited Dec 7, 2015 by Duude Whiting

1 Answer

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While only an expert who can visually and physically test the stone can provide a true identification, Sapphire is the next hardest gemstone on the Moh's scale after diamond, so you can see if it scratches something softer like topaz or quartz.
answered Dec 15, 2015 by hershel (46,460 points)

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