LONDON BLUE TOPAZ

Topaz is named from Greek "topazion" for a type of gemstone, probably after Sanskrit "tapas" - fire, alluding to the brilliance of gem-quality material. Topaz has been known from antiquity . Blue Topaz does occur in nature, but is rare and almost always light color. Colorless or lightly colored topaz goes through processes that create the blue color. Among the colors created, most saturated blue color topaz is named London blue topaz.

Significant Gem Localities:-

 Mined in Brazil, Pakistan, Afghanistan, India, China, Burma, Sri Lanka, Japan, Russia, Ukraine, Australia, Madagascar, Namibia, Nigeria, Zimbabwe, Mexico, U.S.

 Hardness of Topaz is 8 

WEIGHT PER PIECE OF LONDON BLUE TOPAZ
OVAL SHAPE		OCTAGON SHAPE		PEAR SHAPE		ROUND SHAPE		SQUARE SHAPE
SIZE	WEIGHT	SIZE	WEIGHT	SIZE	WEIGHT	SIZE	WEIGHT	SIZE	WEIGHT
5*3MM	0.37	5*3MM		5*3MM		3MM	0.13	3*3MM	0.19
5*4MM	0.43	6*4MM	0.72	6*4MM	0.47	4MM	0.35	4*4MM	0.44
6*4MM	0.59	7*5MM	1.3	7*5MM	0.88	5MM	0.55	5*5MM	0.94
7*5MM	0.94	8*6MM	1.86	8*5MM	1.05	6MM	1.02	6*6MM	1.4
8*6MM	1.14	9*7MM	2.74	8*6MM		7MM	1.5	7*7MM	2.18
9*7MM	2.12	10*8MM	4.17	9*6MM	1.67	8MM	2.31	8*8MM
10*8MM	3.13	11*9MM	7.61	10*7MM	2.38	9MM		10*10MM
11*9MM	4.4	12*10MM	11.23	12*8MM	3.75	10MM
12*10MM		14*10MM
14*10MM