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26.42ct Natural Medium Grey Hematite, Square, Opaque, Photo A

26.42ct Natural Medium Grey Hematite, Square, Opaque

Hematite

26.42ct1 pc
$ 25.86
17 x 17 mm (calibrated)
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1.13ct Natural Deep Orange Hessonite Garnet, Cushion, VS, Photo A

1.13ct Natural Deep Orange Hessonite Garnet, Cushion, VS

Hessonite Garnet

1.13ct1 pc
$ 22.60
6 x 6 mm (calibrated)
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14.85ctw Natural Black Spinel, Round, Opaque, Photo A

14.85ctw Natural Black Spinel, Round, Opaque

Spinel

14.85ct total2 pcs
$ 49.01
12 mm (calibrated)
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3.53ct Natural Dark Golden Citrine, Oval, VVS-VS, Photo A

3.53ct Natural Dark Golden Citrine, Oval, VVS-VS

Citrine

3.53ct1 pc
$ 28.23
11 x 9 mm (calibrated)
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0.31ct Natural Deep Red Ruby, Round, SI, Photo A

0.31ct Natural Deep Red Ruby, Round, SI

Ruby

0.31ct1 pc
$ 111.45
4 mm (calibrated)
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4.07ct Natural Golden Citrine, Oval, VVS-VS, Photo A

4.07ct Natural Golden Citrine, Oval, VVS-VS

Citrine

4.07ct1 pc
$ 31.34
12 x 10 mm (calibrated)
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2.98ct Natural Medium Violet Amethyst, Trillion, VS, Photo A

2.98ct Natural Medium Violet Amethyst, Trillion, VS

Amethyst

2.98ct1 pc
$ 20.86
10 x 10 mm (calibrated)
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1.78ctw Natural Clear White Sapphire, Round, VS, Photo A

1.78ctw Natural Clear White Sapphire, Round, VS

Sapphire

1.78ct total4 pcs
$ 235.72
4.5 mm (calibrated)
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2.12ct Natural Swiss Blue Topaz, Octagon / Emerald Cut, VVS, Photo A

2.12ct Natural Swiss Blue Topaz, Octagon / Emerald Cut, VVS

Topaz

2.12ct1 pc
$ 16.96
8.2 x 6.3 mm
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9.61ct Natural Multicolor Labradorite, Pear Shape, Translucent, Photo A

9.61ct Natural Multicolor Labradorite, Pear Shape, Translucent

Labradorite

9.61ct1 pc
$ 21.33
20 x 15 mm (calibrated)
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2.79ct Natural Multicolor Labradorite, Baguette, Translucent, Photo A

2.79ct Natural Multicolor Labradorite, Baguette, Translucent

Labradorite

2.79ct1 pc
$ 3.85
9.1 x 7.3 mm
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0.69ct Natural Medium Golden Citrine, Heart, VVS-VS, Photo A

0.69ct Natural Medium Golden Citrine, Heart, VVS-VS

Citrine

0.69ct1 pc
$ 4.83
6 x 6 mm (calibrated)
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2.20ct Natural Pinkish Violet Purple Kunzite, Octagon / Emerald Cut, VVS-VS, Photo A

2.20ct Natural Pinkish Violet Purple Kunzite, Octagon / Emerald Cut, VVS-VS

Kunzite

2.20ct1 pc
$ 55.00
7.3 x 5.5 mm
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1.91ct Natural Warm White Sillimanite Cat's Eye, Oval, Translucent, Photo A

1.91ct Natural Warm White Sillimanite Cat's Eye, Oval, Translucent

Sillimanite Cat's Eye

1.91ct1 pc
$ 14.71
9 x 6 mm (calibrated)
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4.72ct Natural Golden Orange Citrine, Oval, VVS-VS, Photo A

4.72ct Natural Golden Orange Citrine, Oval, VVS-VS

Citrine

4.72ct1 pc
$ 37.76
12 x 10 mm (calibrated)
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1.03ct Natural Bright Gold Citrine, Trillion, VVS, Photo A

1.03ct Natural Bright Gold Citrine, Trillion, VVS

Citrine

1.03ct1 pc
$ 8.24
7 x 7 mm (calibrated)
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4.70ct Natural Pinkish Violet Amethyst, Round, VVS-VS, Photo A

4.70ct Natural Pinkish Violet Amethyst, Round, VVS-VS

Amethyst

4.70ct1 pc
$ 31.02
11 mm (calibrated)
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2.06ctw Natural Black Onyx, Round, Opaque, Photo A

2.06ctw Natural Black Onyx, Round, Opaque

Onyx

2.06ct total2 pcs
$ 4.12
6.5 mm (calibrated)
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0.66ct Natural Navy Blue Sapphire, Round, VVS, Photo A

0.66ct Natural Navy Blue Sapphire, Round, VVS

Sapphire

0.66ct1 pc
$ 394.45
5 mm (calibrated)
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4.76ct Natural Golden Orange Citrine, Oval, VVS-VS, Photo A

4.76ct Natural Golden Orange Citrine, Oval, VVS-VS

Citrine

4.76ct1 pc
$ 28.69
14 x 10 mm (calibrated)
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0.78ct Natural Light Golden Morganite, Pear Shape, VS, Photo A

0.78ct Natural Light Golden Morganite, Pear Shape, VS

Morganite

0.78ct1 pc
$ 34.32
8 x 6 mm (calibrated)
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0.29ctw Natural Black Diamond, Square, Opaque, Photo A

0.29ctw Natural Black Diamond, Square, Opaque

Diamond

0.29ct total2 pcs
$ 145.00
2.5 x 2.4 mm
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2.87ct Natural Iris Violet Amethyst, Pear Shape, VS, Photo A

2.87ct Natural Iris Violet Amethyst, Pear Shape, VS

Amethyst

2.87ct1 pc
$ 22.10
13 x 9 mm (calibrated)
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1.61ct Natural Multicolor Opal, Oval, Transparent, Photo A

1.61ct Natural Multicolor Opal, Oval, Transparent

Opal

1.61ct1 pc
$ 40.25
10.7 x 7.8 mm
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1.56ctw Natural Light Royal Purple Pink Sapphire, Octagon / Emerald Cut, VS, Photo A

1.56ctw Natural Light Royal Purple Pink Sapphire, Octagon / Emerald Cut, VS

Sapphire

1.56ct total10 pcs
$ 51.48
2.8 x 2.8 mm
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4.01ctw Natural Sangria Red Pyrope Garnet, Marquise, VVS-VS, Photo A

4.01ctw Natural Sangria Red Pyrope Garnet, Marquise, VVS-VS

Pyrope Garnet

4.01ct total2 pcs
$ 44.24
12 x 5.9 mm
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2.82ct Natural Deep Violet Amethyst, Oval, Transparent, Photo A

2.82ct Natural Deep Violet Amethyst, Oval, Transparent

Amethyst

2.82ct1 pc
$ 16.92
10 x 8 mm (calibrated)
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0.74ct Natural Multicolor Opal, Cushion, Opaque, Photo A

0.74ct Natural Multicolor Opal, Cushion, Opaque

Opal

0.74ct1 pc
$ 24.42
8.7 x 4.8 mm
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2.63ctw Natural Lime Green Prehnite, Oval, Transparent, Photo A

2.63ctw Natural Lime Green Prehnite, Oval, Transparent

Prehnite

2.63ct total2 pcs
$ 28.93
7 x 5.3 mm
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1.09ct Natural Light Yellow Color-Change Diaspore, Octagon / Emerald Cut, VS-SI, Photo A

1.09ct Natural Light Yellow Color-Change Diaspore, Octagon / Emerald Cut, VS-SI

Color-Change Diaspore

1.09ct1 pc
$ 51.98
7.1 x 5.4 mm
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2.16ct Natural Deep Blue Kyanite, Oval, SI, Photo A

2.16ct Natural Deep Blue Kyanite, Oval, SI

Kyanite

2.16ct1 pc
$ 43.20
8 x 6 mm (calibrated)
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9.32ct Natural Multicolor Rainbow Pyrite, Square, Opaque, Photo A

9.32ct Natural Multicolor Rainbow Pyrite, Square, Opaque

Rainbow Pyrite

9.32ct1 pc
$ 24.14
14 x 14 mm (calibrated)
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Photos are of Actual Products for Sale

Cat's eye diaspore, sometimes marketed under the name Zultanite, is a color change gem from Turkey recently introduced to the international market. Diaspore is a hydrated aluminum oxide colored by manganese. It was first faceted as a gemstone in the 1980s, but has never been mined commercially until recently. With reasonably good hardness (6.5 to 7 on the Mohs scale) and good brilliance, diaspore has been attracting considerable attention in the gem world.

Cat's eye diaspore gems are fairly rare. The chatoyancy or cat's eye effect is caused by the alignment of rutile needles.

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