Iolite Gemstones

  • Hardness

    7.0 - 7.5 on the Mohs scale.

  • Occurrence

    Named after P. Cordier, a French geologist. Cordierite is also known as iolite and dichroite. Other common names are water sapphire and Vikings' compass, named so because of it's ability to determine the direction of the sun on overcast days. Cordierite is found in Germany, Brazil, Norway, Finland and Madagascar.

  • Appearance

    Has strong pleochroism, meaning the gemstone changes colors depending which angle it is viewed from. Cordierite displays colors ranging from deep blue, to violet and light blue and grayish blue. It can be confused with tanzanite (zoisite) which is also strongly pleochroic.

  • Enhancements

    Iolite is not enhanced.

    More information on gemstone enhancements.

Water Sapphire (Iolite)
Water Sapphire (Iolite)

IOL149
IOL149
 0.12 ct. total
2.6mm Round Cut
Medium
Very Slightly Grayish Violetish Blue
Loupe Clean
[N] Not enhanced.
Quantity Available: 18 pairs
Water Sapphire Iolite

IOL208
IOL208
 0.03 ct., 'AA' Grade
2.0mm Round Cut
Dark
Moderately Strong Violetish Blue
Loupe Clean
[N] Not enhanced.
One of a kind.
Water Sapphire Iolite

IOL209
IOL209
 0.12 ct., 'AA' Grade
5.0x2.5mm Marquise Cut
Medium Dark
Strong Bluish Violet
Very Very Slightly Included
[N] Not enhanced.
Quantity Available: 3
Water Sapphire Iolite

IOL198
IOL198
 1.04 ct. total, 'AA' Grade
5.0mm Square (Step) Cut
Medium Light
Strong Violetish Blue
Loupe Clean
[N] Not enhanced.
Quantity Available: 9 pairs
Water Sapphire Iolite

IOL210
IOL210
 0.39 ct., 'AA' Grade
4.5mm Square (Step) Cut
Medium
Strong Bluish Violet
Very Very Slightly Included
[N] Not enhanced.
One of a kind.
Water Sapphire Iolite

IOL206
IOL206
 0.55 ct., 'AA' Grade
5.9mm Trillion Cut
Medium Dark
Strong Bluish Violet
Very Slightly Included
[N] Not enhanced.
One of a kind.
Water Sapphire Iolite

IOL207
IOL207
 0.62 ct., 'AA' Grade
6.5mm Trillion Cut
Medium Dark
Strong Violetish Blue
Loupe Clean
[N] Not enhanced.
One of a kind.
Water Sapphire Iolite

IOL153
IOL153
 0.55 ct. total
4.0mm Cabochon, Round Cut
Dark
Very Slightly Grayish Violetish Blue
Very Slightly Included
[N] Not enhanced.
Quantity Available: 21 pairs
Water Sapphire Iolite

IOL154
IOL154
 1.68 ct. total
6.0mm Cabochon, Round Cut
Dark
Strong Violetish Blue
Moderately Included
[N] Not enhanced.
Quantity Available: 3 pairs
Water Sapphire Iolite

IOL155
IOL155
 2.57 ct. total
7.0mm Cabochon, Round Cut
Dark
Very Slightly Grayish Violetish Blue
Very Slightly Included
[N] Not enhanced.
Quantity Available: 2 pairs
Water Sapphire Iolite

IOL156
IOL156
 0.95 ct. total
6.0x4.0mm Cabochon, Oval Cut
Dark
Very Slightly Grayish Violetish Blue
Very Slightly Included
[N] Not enhanced.
Quantity Available: 8 pairs
Water Sapphire Iolite

IOL157
IOL157
 1.61 ct. total
7.0x5.0mm Cabochon, Oval Cut
Dark
Very Slightly Grayish Violetish Blue
Very Slightly Included
[N] Not enhanced.
Quantity Available: 6 pairs
Water Sapphire Iolite

Calibrated Iolite
Calibrated Iolite

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 Eye clean, medium dark grayish purple, grape color, good cut.

Iolite Quality AA
Shape Size Avg. Weight Price Each
Round CutRound Cut
2mm
0.03 ct.
2.5mm
0.06 ct.
3mm
0.10 ct.
3.5mm
0.16 ct.
4mm
0.22 ct.
4.5mm
0.33 ct.
5mm
0.41 ct.
5.5mm
0.55 ct.
6mm
0.72 ct.
8mm
1.64 ct.
 
  AA
Oval CutOval Cut
4x3mm
0.15 ct.
5x3mm
0.22 ct.
6x4mm
0.40 ct.
7x5mm
0.73 ct.
8x6mm
1.16 ct.
9x7mm
1.83 ct.
10x8mm
2.30 ct.
12x10mm
4.25 ct.
 
  AA
Pear CutPear Cut
5x3mm
0.19 ct.
6x4mm
0.35 ct.
7x5mm
0.58 ct.
8x5mm
0.74 ct.
9x6mm
1.11 ct.
10x7mm
1.48 ct.
 
  AA
Marquise CutMarquise Cut
4x2mm
0.08 ct.
5x2.5mm
0.13 ct.
6x3mm
0.18 ct.
7x3.5mm
0.30 ct.
8x4mm
0.37 ct.
10x5mm
0.74 ct.
 
  AA
Emerald CutEmerald Cut
4x3mm
0.16 ct.
5x3mm
0.19 ct.
6x4mm
0.39 ct.
7x5mm
0.95 ct.
8x6mm
1.16 ct.
9x7mm
1.83 ct.
 
  AA
Square (Step) CutSquare (Step) Cut
2.5mm
0.08 ct.
3mm
0.14 ct.
3.5mm
0.18 ct.
4mm
0.32 ct.
5mm
0.60 ct.
6mm
1.00 ct.
 
  AA
Trillion CutTrillion Cut
4mm
0.20 ct.
5mm
0.38 ct.
6mm
0.63 ct.
6.5mm
0.75 ct.

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