Gemstone.    Natural London Topaz
Color.               Deep Blue
Quantity.       10
Clearity.        Flawless
Gem Wt.        308.9 Cts
Luster.           Excellent
Dimension.  Mixed
Shape.            Oval
Treatment.   Heat and Irradiated
Origin.            Brazil
Certified.       Verified by GIA gemologist and on request can get certificate.
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Alifgems Limited
Hong Kong.
SMD GEMS 
Bangkok, Thailand