Blue Topaz - Calibrated and Single Stones

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Blue Topaz
Chemical Formula	Al2SiO4(F,OH)2	Blue Topaz comes from the Topaz family. It gets its blue because of of irratdiation and heat treatment. Major sources of Blue Topaz are Brazil, Sri Lanka, China and Nigeria. Our blue topaz are NRC certified. We carry Blue Topaz in calibrated sizes in several shapes such as rounds, ovals, marquise, cushions, etc in various sizes. For more information on the sizes we usually keep in calibrated sizes, please click here. We can also cut precision cut Blue Topaz, this is finely cut and crafted to bring the maximum brilliancy into it. This is done with the help of automated machines and skilled labour. For your demands in precision cut, please contact us for more information. We can accomodate pairs, layouts and single unique Blue Topaz. Also perfected is the art of special cuts or custom cuts. This is suited to fit your specifications and can be any shape and/or cut of your choice. For your requirements, please contact us.
Crystal Habit	Prismatic, elongate
Crystal System	Orthorhombic
Cleavage	[001] Perfect
Fracture	Conchoidal
Hardness (Mohs Scale)	8
Luster	Vitreous
Refractive Index	nα = 1.606–1.629 nβ = 1.609–1.631 nγ = 1.616–1.638
Optical properties	Biaxial (+)
Birefringence	0.01
Pleochroism	Weak in thick sections
Streak	White
Specific Gravity	3.49-3.57

Blue Topaz - Calibrated Sizes

We make the following calibrated sizes and can even make other in-between sizes as well. For rounds, we can cut step cut and brilliant cut (diamond cut). For squares, we can cut step cut and princess cut and and special cuts such as french cut as well.

Oval	3x2	4x3	5x3	5x4	6x4	6x5	7x5	8x6	9x7	10x8	& bigger
Pear	3x2	4x3	5x3	5x4	6x4	6x5	7x5	8x6	9x7	10x8	& bigger
Round		1.5	2.0	2.5	3.0	3.5	4.0	4.5	5.0	5.5	& bigger
Square		1.5	2.0	2.5	3.0	3.5	4.0	4.5	5.0	5.5	& bigger
Marquise	3x1.5	4x2	5x2.5	6x3	7x3.5	8x4	9x4.5	10x5	12x6	14x7	& bigger
Baguette	3x1.5	4x2	5x2.5	6x3	7x3.5	8x4	9x4.5	10x5	12x6	14x7	& bigger
Octagon		4x3	5x3	5x4	6x4	6x5	7x5	8x6	9x7	10x8	& bigger
Heart					3.0	3.5	4.0	4.5	5.0	5.5	& bigger
Trillion					3.0	3.5	4.0	4.5	5.0	5.5	& bigger
Drop / Briollet		4x3	5x3	5x4	6x4	6x5	7x5	8x6	9x7	10x8	& bigger