Swiss Blue Topaz Gemstones

  • Hardness

    8.0 on the Mohs scale.

  • Occurrence

    Brazil, U.S., Sri Lanka (Ceylon), Myanmar (Burma), former USSR, Australia, Pakistan, Mexico, Tasmania, Japan, Africa. Topaz and citrine are the birthstones of the month of November. Some blue topaz are indistinguishable from aquamarine with the naked eye. Most blue topaz is irradiated and heat treated silver topaz, although it is sometimes found naturally. The names "Sky blue", "Swiss blue", "London blue" are trade names which refer to the darkness of the gemstone, with "sky blue" being the lightest and "London blue" being the darkest.

  • Appearance

    Swiss blue topaz, also known as electric blue topaz, is the bright vivid form of blue topaz, darker than sky blue topaz, and not as dark as the london blue topaz.

  • Enhancements

    Blue topaz is usually irradiated and often heated to produce blue color.

    More information on gemstone enhancements.

  • Gemstone Family

    Swiss Blue Topaz is a member of the Precious Topaz gemstone family.

Swiss Blue Topaz
Swiss Blue Topaz

TPZ223
TPZ223
 3.12 ct. total, 'AA' Grade
8.0x6.0mm Oval Cut
Medium
Vivid Very Strongly Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
Quantity Available: 1 pairs
Swiss Blue Topaz

TPZ309
TPZ309
 1.76 ct. total
7.0x5.0mm Oval Cut
Medium
Vivid Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
Quantity Available: 14 pairs
Swiss Blue Topaz

TPZ425
TPZ425
 5.06 ct.
12.1x10.0mm Oval Cut
Medium
Vivid Green-Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ364
TPZ364
 1.96 ct.
8.0x6.0mm Emerald Cut
Medium Light
Vivid Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ687
TPZ687
 3.25 ct., 'AA' Grade
8.0mm Square (Step) Cut
Medium Light
Strong Greenish Blue
Very Slightly Included
[R] Neutron irradiated and/or heat treated.
One of a kind.
Ring Size 7 1/4 - Sterling Silver item #120989.
Swiss Blue Topaz

TPZ690
TPZ690
 1.43 ct., 'AA' Grade
6.1mm Square (Step) Cut
Medium
Vivid Very Strongly Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ685
TPZ685
 1.21 ct., 'AA' Grade
6.0mm Cabochon, Trillion Cut
Medium
Vivid Very Strongly Greenish Blue
Very Slightly Included
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ628
TPZ628
 4.72 ct.
16.6x9.1mm Fancy Cut
Medium
Vivid Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ670
TPZ670
 6.62 ct.
12.8x9.9mm Fancy Cut
Medium
Vivid Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ671
TPZ671
 6.27 ct.
12.9x9.9mm Fancy Cut
Medium
Vivid Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ672
TPZ672
 9.46 ct.
14.1x11.7mm Fancy Cut
Medium
Vivid Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

TPZ684
TPZ684
 1.69 ct., 'AA' Grade
7.1mm Round, Checkerboard Top Cut
Medium Light
Vivid Very Strongly Greenish Blue
Loupe Clean
[R] Neutron irradiated and/or heat treated.
One of a kind.
Swiss Blue Topaz

Calibrated Swiss Blue Topaz
Calibrated Swiss Blue Topaz

Specify size, shape and quality when ordering. Prices are subject to change without notice. Actual carat weight may vary from the average carat weight listed.

  • AA Medium to dark, cleanish, good cut, good polish, good brillliance.

Swiss Blue Topaz Quality AA
Shape Size Avg. Weight Price Each
Round CutRound Cut
1mm
0.006 ct.
1.25mm
0.01 ct.
2mm
0.05 ct.
2.25mm
0.06 ct.
2.5mm
0.09 ct.
2.75mm
0.11 ct.
3mm
0.14 ct.
3.25mm
0.16 ct.
3.5mm
0.22 ct.
4mm
0.33 ct.
4.5mm
0.45 ct.
5mm
0.60 ct.
5.5mm
0.80 ct.
6mm
1.05 ct.
6.5mm
1.30 ct.
7mm
1.65 ct.
8mm
2.40 ct.
 
  AA
Oval CutOval Cut
5x3mm
0.30 ct.
6x4mm
0.58 ct.
7x5mm
1.00 ct.
8x6mm
1.60 ct.
9x7mm
2.40 ct.
10x8mm
3.60 ct.
11x9mm
4.60 ct.
12x10mm
6.00 ct.
14x10mm
7.50 ct.
14x12mm
10.60 ct.
16x12mm
11.80 ct.
18x13mm
18.40 ct.
 
  AA
Pear CutPear Cut
5x3mm
0.26 ct.
6x4mm
0.50 ct.
7x5mm
0.75 ct.
8x5mm
1.00 ct.
8x6mm
1.40 ct.
9x6mm
1.65 ct.
10x7mm
2.35 ct.
12x8mm
3.65 ct.
13x9mm
4.68 ct.
14x9mm
5.75 ct.
15x10mm
6.53 ct.
16x12mm
10.08 ct.
18x13mm
12.93 ct.
20x15mm
18.85 ct.
 
  AA
Marquise CutMarquise Cut
4x2mm
0.11 ct.
5x2.5mm
0.18 ct.
6x3mm
0.32 ct.
8x4mm
0.66 ct.
10x5mm
1.33 ct.
12x6mm
2.15 ct.
14x7mm
3.40 ct.
 
  AA
Emerald CutEmerald Cut
5x3mm
0.37 ct.
6x4mm
0.70 ct.
7x5mm
1.30 ct.
8x6mm
2.00 ct.
9x7mm
3.00 ct.
10x8mm
4.25 ct.
11x9mm
5.80 ct.
12x10mm
7.80 ct.
14x10mm
9.10 ct.
14x12mm
12.70 ct.
16x12mm
14.95 ct.
 
  AA
Square (Step) CutSquare (Step) Cut
3mm
0.20 ct.
4mm
0.45 ct.
4.5mm
0.57 ct.
5mm
0.83 ct.
6mm
1.42 ct.
8mm
3.25 ct.
 
  AA
Heart ShapeHeart Shape
3mm
0.12 ct.
4mm
0.32 ct.
5mm
0.50 ct.
6mm
0.80 ct.
7mm
1.38 ct.
8mm
2.30 ct.
9mm
3.30 ct.
10mm
4.90 ct.
12mm
6.51 ct.
 
  AA
Trillion CutTrillion Cut
4mm
0.28 ct.
5mm
0.62 ct.
6mm
1.00 ct.
7mm
1.50 ct.
8mm
2.20 ct.
9mm
3.45 ct.
 
  AA
Straight Baguette CutStraight Baguette Cut
4x2mm
0.14 ct.
5x2mm
0.20 ct.
5x2.5mm
0.30 ct.
6x3mm
0.45 ct.
8x4mm
1.10 ct.
 
  AA
Tapered Baguette CutTapered Baguette Cut
4x2x1.5mm
0.12 ct.
 
  AA
Princess CutPrincess Cut
3mm
0.18 ct.
3.5mm
0.28 ct.
4mm
0.40 ct.
4.5mm
0.57 ct.
5mm
0.80 ct.
5.5mm
1.10 ct.
6mm
1.38 ct.
6.5mm
1.65 ct.
8mm
2.75 ct.
 
  AA
Cabochon, Oval CutCabochon, Oval Cut
5x3mm
0.40 ct.
6x4mm
0.60 ct.
7x5mm
1.10 ct.
8x6mm
1.66 ct.
9x7mm
2.52 ct.
10x8mm
3.55 ct.
12x10mm
6.27 ct.
14x10mm
9.00 ct.
 
  AA
Cabochon, Square CutCabochon, Square Cut
7mm
2.50 ct.
 
  AA
Antique CutAntique Cut
5mm
0.75 ct.
6mm
1.25 ct.
12mm
9.60 ct.
 
  AA
Antique Cushion CutAntique Cushion Cut
8x6mm
1.70 ct.
9x7mm
2.50 ct.
10x8mm
3.50 ct.
11x9mm
5.00 ct.
12x10mm
6.60 ct.
14x10mm
7.70 ct.
 
  AA
Roll Top CutRoll Top Cut
10x8mm
3.60 ct.
 
  AA
Round, Checkerboard Top CutRound, Checkerboard Top Cut
7mm
1.65 ct.
8mm
2.50 ct.
 
  AA
Antique, Checkerboard Top CutAntique, Checkerboard Top Cut
5mm
0.75 ct.
6mm
1.25 ct.
7mm
1.80 ct.
8mm
2.80 ct.
9mm
3.50 ct.
10mm
5.50 ct.
12mm
9.60 ct.
 
  AA
Antique Cushion, Checkerboard Top CutAntique Cushion, Checkerboard Top Cut
8x6mm
1.70 ct.
9x7mm
2.45 ct.
10x8mm
3.45 ct.

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