The birthstone of December, Blue Topaz is found in a variety of shades from dark to light blue.
Although found naturally, most stones are silver topaz which have been colour enhanced.

Thandi	Azul	Jina	Destiny
1 x 12x8 Pear Blue Topaz = 3.56 Carats; 8 x 1.3mm Round Diamonds = 0.08 Carats	2 x 6mm Round Blue Topaz = 2.18 Carats	1 x 9x7 Octagonal Blue Topaz = 1.19 Carats; 6 x 1mm Round Diamonds = 0.03 Carats; 8 x 1.3mm Round Diamonds = 0.08 Carats	21 x 5x4 Oval Blue Topaz = 10.50 Carats
9ct = 7.75gr	9ct = 1.42gr	9ct = 4.51gr	9ct = 8.40gr
14ct = 9.69gr	14ct = 1.78gr	14ct = 5.64gr	14ct = 10.50gr
18ct = 10.85gr	18ct = 1.99gr	18ct = 6.31gr	18ct = 11.76gr