Topaz-Blue

To achieve this stone's color we take a colorless topaz and use irradiation with gamma rays. We can create a color range of light(sky) blue, medium (Swiss) blue and dark (London) blue which depends on how much irradiation the topaz is exposed to. Topaz is 8 in hardness and takes a high polish. Brazil is the chief supplier of colorless topaz. *The London blue Topaz stone is not always available.
ROUND - SWISS/LONDON*        SKY OVAL  - SWISS/LONDON*           SKY OCTAGON-SWISS/LONDON*           SKY
1.50mm          $1.50                     $.75 5x3mm               $2.40               $1.50 5x3mm             $3.25                       $1.95
1.75mm            2.00                     1.00 6x4mm                 3.85                  2.75 6x4mm               4.25                          3.00
2.00mm            2.25                     1.25 7x5mm                 6.50                  3.25 7x5mm               6.95                          3.65
2.50mm            2.40                     1.35 8x6mm                 8.95                  4.75 8x6mm             13.35                          6.95
3.00mm            2.60                     1.50 9x7mm               14.00                  7.25 9x7mm             19.00                          9.85
3.50mm            2.85                     1.65 10x8mm             19.50                10.50 10x8mm           22.00                        11.50
4.00mm            3.25                     1.85 11x9mm             25.00                13.00 11x9mm           32.00                        16.50
5.00mm            3.60                     2.00 12x10mm           33.50                17.50 12x10mm         44.50                        23.00
6.00mm            5.75                     3.65 14x10mm           48.75                25.50 14x10mm         52.75                        27.50
7.00mm            8.75                     4.65 14x12mm           58.00                29.00 14x12mm         64.00                        34.50
8.00mm          13.75                     7.50 16x12mm           67.00                35.00 16x12mm         78.00                        40.50
9.00mm          17.00                     8.75 18x13mm           95.00                50.00 18x13mm       116.50                        61.00
10.00mm        32.00                   17.25 20x15mm         125.00                65.00 20x15mm       145.00                        75.00
     
MARQUISE-SWISS/LONDON*         SKY PEAR-SWISS/LONDON*             SKY HEART-SWISS/LONDON*         SKY
4x2mm        $1.35                        $1.00 5x3mm        $2.00                    $1.00 4x4mm          $3.25                   $1.65
5x2.5mm       2.00                          1.50 6x4mm          3.25                       2.35 5x5mm             5.50                     2.50
6x3mm           2.85                         1.85 7x5mm          5.55                       2.90 6x6mm             6.75                     4.00
8x4mm           5.25                         3.00 8x5mm          6.15                       3.25 7x7mm             9.00                     4.95
10x5mm         7.95                         4.35 9x6mm        11.00                       5.75 8x8mm           15.25                     8.50
12x6mm       12.95                         7.28 10x7mm      19.50                     10.25 10x10mm       24.50                  13.50
15x7mm       28.00                       11.50 13x8mm      36.00                     18.75  
  14x9mm      48.00                     24.65  
  15x10mm    50.00                     26.50  
     
SQUARE - SWISS/LONDON               SKY TRILLION - SWISS/LONDON  
3x3mm        $3.25                          $1.00 4x4mm             $3.00  
4x4mm          3.60                             1.75 5x5mm               4.50  
5x5mm          5.60                             3.00 6x6mm               6.75  
6x6mm          7.95                             5.25 7x7mm               9.00  
7x7mm        13.95                             6.75 8x8mm             13.75