Blue Diamond

  • Hardness

    10.0 on the Mohs scale.

  • Occurrence

    Worldwide, most notable locations are Australia, Africa, Brazil, Russia, India and most recently, Northern Canada. Diamond is the birthstone for the month of April.

  • Appearance

    Transparent, teal blue in color.

  • Enhancements

    Diamond is occasionally to commonly laser drilled to improve appearance. Surface cavities or fractures are occasionally filled with a hardened surface. Colored diamonds are occasionally irradiated and/or heat treated to induce "fancy" colors.

    More information on gemstone enhancements.

  • Gemstone Family

    Blue Diamond is a member of the Diamond gemstone family.

Calibrated Blue Diamond
Calibrated Blue Diamond

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.

  • SI Slightly included. Some inclusions may be visible to the naked eye.

Blue Diamond Quality SI
Shape Size Avg. Weight Price Each
Round CutRound Cut
1mm
0.005 ct.
1.2mm
0.0075 ct.
1.3mm
0.01 ct.
1.5mm
0.015 ct.
1.7mm
0.02 ct.
1.8mm
0.025 ct.
2mm
0.03 ct.
2.2mm
0.04 ct.
2.4mm
0.05 ct.
2.5mm
0.06 ct.
2.7mm
0.07 ct.
2.8mm
0.08 ct.
3mm
0.10 ct.
3.2mm
0.12 ct.
3.4mm
0.15 ct.
3.7mm
0.20 ct.
4mm
0.25 ct.
4.4mm
0.33 ct.
4.5mm
0.41 ct.
4.9mm
0.55 ct.
5.5mm
0.75 ct.
6.25mm
1.05 ct.
 
  SI
Princess CutPrincess Cut
1.5mm
0.023 ct.
1.75mm
0.037 ct.
2mm
0.05 ct.
2.25mm
0.07 ct.
2.5mm
0.10 ct.
2.75mm
0.12 ct.
3mm
0.17 ct.
3.25mm
0.21 ct.
3.5mm
0.25 ct.
3.75mm
0.31 ct.
4mm
0.38 ct.
4.25mm
0.55 ct.
5mm
0.75 ct.
5.5mm
1.05 ct.

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