Turquoise

In turquoise stones, the mineral is a hydrous copper aluminum phosphate; the rich blue colors are ascribed to copper, while the presence of iron introduces a greenish cast. The U.S. today is a major source of turquoise. Most of the mines are in Arizona and New Mexico. Persian turquoise is known to be among the finest stones because it is dense, non-porous and can take a high polish.
GENUINE TURQUOISE GENUINE TURQUOISE IMITATION TURQUOISE IMITATION TURQUOISE IMITATION TURQUOISE IMITATION TURQUOISE
OVAL CABACHON ROUND CABACHON OVAL CABACHON ROUND CABACHON PEAR CABACHON MARQUISE CABACHON
5X3 mm               $1.50 2.00mm            $1.00 5x3 mm               $.80 2.00 mm              $.50 5x3 mm           $1.20 4x2 mm         $1.00
6x4 mm                  2.25 3.00mm              1.20 6x4 mm               1.00 3.00 mm                .60 6x4 mm             1.30 6x3 mm            1.25
7x5 mm                  4.20 4.00mm              1.50 7x5 mm               1.10 4.00 mm                .65 7x5 mm             1.40 10x5 mm          1.50
8x6 mm                  6.50 5.00mm              2.00 8x6 mm               1.20 5.00 mm                .80 8x5 mm             1.50 12x6 mm           2.25
9x7 mm                  8.75 6.00mm              3.50 9x7 mm               1.40 6.00 mm                .85 9x6 mm             1.60 15x7 mm           3.25
10x8 mm             14.00 7.00mm              6.50 10x8 mm             1.60 7.00 mm              1.00 10x7 mm           1.70  
11x9 mm             20.00 8.00mm              9.50 11x9 mm             1.80 8.00 mm              1.40 13x8 mm           2.00  
12x10 mm           36.00 9.00mm            15.00 12x10 mm           2.00 9.00 mm              1.60 15x10 mm         3.00  
14x10 mm           52.00 10.00mm          24.00 14x10 mm           2.60 10.00 mm            1.80    
16x12mm            90.00 11.00mm          40.00 14x12 mm           3.00 11.00 mm            2.00    
18x13mm          125.00 12.00mm          55.00 16x12 mm           3.80 12.00 mm            2.20    
20x15mm          175.00 13.00mm          60.00 18x13 mm           4.20 15.00 mm            3.00    
  14.00mm          80.00 20x15 mm           5.20 18.00 mm            3.80    
    25x18 mm           5.60 20.00 mm            4.50    
    30x22 mm           6.60 25.00 mm            5.00    
    40x30 mm           7.50 30.00 mm            6.00    
      38.00 mm            7.00