LARGE LONDON BLUE TOPAZ -USA TREATED -17.80 CTS [F1230 ]

Item Information

Dimensions (mm) not provided
Weight (carats) 18 carats
Colors
Certified Gemstone

LONDON BLUE TOPAZ

 

This is a specimen of  chunky topaz rough ideal for faceting .This material was treated in the usa  to strict standareds-This stone is a dark blue colour known as London blue.The treatment is permanent.

Source Brazil

 TREATMENT -IRRIDATED 

Mohs scale 8

Weight 17.80 CTS APP 

Size  18 x 16 x 10  MM APP.

Treatments-When heated, yellow topaz often becomes reddish-pink. Only stones of a brown-yellow color yield the pink; the pale yellow ones usually turn white. The pink color is stable. Topaz can also be irradiated, turning the stone blue, ranging from a light pure color to very dark almost electric blue

AS WITH ALL OUR STOCK YOU MAY RETURN IT FOR A FULL REFUND  IF NOT PLEASED .

MEMBER OF INTERNATIONAL COLOURED STONE ASSOCIATION 

1d 18h 43m 8s

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Pricing & Details

Bid Increment $1.00
Starting Bid $29.00
Auction ID 135502
Watchers 5 watching
Viewed 706 times
Starts 2nd Dec 2016 11:02pm PST
Ends 5th Dec 2016 11:00pm PST

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