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Home Calibrated Gemstones Square Shape 13x13 mm Gems

Calibrated Square Cut Gemstones in Size 13x13 mm

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1.28ct Natural Bluish White Rainbow Moonstone, Oval, Transparent, Photo A

1.28ct Natural Bluish White Rainbow Moonstone, Oval, Transparent

Rainbow Moonstone

1.28ct1 pc
$ 40.79
9 x 7 mm (calibrated)
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3.97ctw Natural Sky Blue Topaz, Pear Shape, VVS-VS, Photo A

3.97ctw Natural Sky Blue Topaz, Pear Shape, VVS-VS

Topaz

3.97ct total8 pcs
$ 21.70
6 x 4 mm (calibrated)
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2.52ctw Natural Multicolor Pietersite, Round, Opaque, Photo A

2.52ctw Natural Multicolor Pietersite, Round, Opaque

Pietersite

2.52ct total2 pcs
$ 5.94
7.5 mm (calibrated)
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5.52ctw Natural Sky Blue Topaz, Heart, VVS, Photo A

5.52ctw Natural Sky Blue Topaz, Heart, VVS

Topaz

5.52ct total2 pcs
$ 39.31
9 x 9 mm (calibrated)
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1.68ct Natural Multicolor Opal, Oval, Transparent, Photo A

1.68ct Natural Multicolor Opal, Oval, Transparent

Opal

1.68ct1 pc
$ 41.83
10.6 x 8.2 mm
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1.80ctw Natural Sky Blue Topaz, Pear Shape, VVS, Photo A

1.80ctw Natural Sky Blue Topaz, Pear Shape, VVS

Topaz

1.80ct total2 pcs
$ 12.72
7.3 x 5.2 mm
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8.78ct Natural Lively Green Chrysoprase, Oval, Opaque, Photo A

8.78ct Natural Lively Green Chrysoprase, Oval, Opaque

Chrysoprase

8.78ct1 pc
$ 109.31
14 x 12 mm (calibrated)
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2.91ct Natural Medium Violet Amethyst, Trillion, VVS-VS, Photo A

2.91ct Natural Medium Violet Amethyst, Trillion, VVS-VS

Amethyst

2.91ct1 pc
$ 20.29
10 x 10 mm (calibrated)
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0.33ct Natural Medium Grey Cat's Eye Alexandrite, Oval, Opaque, Photo A

0.33ct Natural Medium Grey Cat's Eye Alexandrite, Oval, Opaque

Cat's Eye Alexandrite

0.33ct1 pc
$ 54.78
5 x 3.4 mm
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12.14ct Natural Light Yellow Quartz, Oval, Transparent, Photo A

12.14ct Natural Light Yellow Quartz, Oval, Transparent

Quartz

12.14ct1 pc
$ 12.09
15.2 x 12.5 mm
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5.10ct Natural Medium Red Star Ruby, Oval, Opaque, Photo A

5.10ct Natural Medium Red Star Ruby, Oval, Opaque

Star Ruby

5.10ct1 pc
$ 81.27
10 x 8 mm (calibrated)
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1.43ctw Natural Intense Blue Tanzanite, Pear Shape, VS, Photo A

1.43ctw Natural Intense Blue Tanzanite, Pear Shape, VS

Tanzanite

1.43ct total6 pcs
$ 54.84
5 x 3 mm (calibrated)
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1.44ctw Natural Clear White Sapphire, Round, VS, Photo A

1.44ctw Natural Clear White Sapphire, Round, VS

Sapphire

1.44ct total4 pcs
$ 190.20
4.3 mm
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0.92ct Natural Light Yellow Color-Change Diaspore, Pear Shape, VS, Photo A

0.92ct Natural Light Yellow Color-Change Diaspore, Pear Shape, VS

Color-Change Diaspore

0.92ct1 pc
$ 32.25
10.9 x 4.3 mm
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8.71ct Natural Light Bluish Turquoise Aquamarine, Cushion, Translucent, Photo A

8.71ct Natural Light Bluish Turquoise Aquamarine, Cushion, Translucent

Aquamarine

8.71ct1 pc
$ 180.73
17.8 x 11.1 mm
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0.81ct Natural Light Yellow Sapphire, Oval, VVS, Photo A

0.81ct Natural Light Yellow Sapphire, Oval, VVS

Sapphire

0.81ct1 pc
$ 80.68
6 x 4 mm (calibrated)
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2.64ct Natural Deep Pink Tourmaline, Octagon / Emerald Cut, SI, Photo A

2.64ct Natural Deep Pink Tourmaline, Octagon / Emerald Cut, SI

Tourmaline

2.64ct1 pc
$ 199.58
8.6 x 7.5 mm
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0.87ct Natural Dark Orange-Gold Citrine, Marquise, VVS-VS, Photo A

0.87ct Natural Dark Orange-Gold Citrine, Marquise, VVS-VS

Citrine

0.87ct1 pc
$ 6.93
9 x 5.1 mm
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1.64ct Natural Brownish Orange Zircon, Octagon / Emerald Cut, VVS, Photo A

1.64ct Natural Brownish Orange Zircon, Octagon / Emerald Cut, VVS

Zircon

1.64ct1 pc
$ 26.95
7 x 5 mm (calibrated)
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0.49ct Natural Multicolor Opal, Oval, Opaque, Photo A

0.49ct Natural Multicolor Opal, Oval, Opaque

Opal

0.49ct1 pc
$ 14.64
7 x 5 mm (calibrated)
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4.06ct Natural Light Rose Pink Strawberry Quartz, Oval, Translucent, Photo A

4.06ct Natural Light Rose Pink Strawberry Quartz, Oval, Translucent

Strawberry Quartz

4.06ct1 pc
$ 48.52
12 x 10 mm (calibrated)
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3.47ct Natural Sky Blue Topaz, Flower Cut, Transparent, Photo A

3.47ct Natural Sky Blue Topaz, Flower Cut, Transparent

Topaz

3.47ct1 pc
$ 37.86
9.4 x 9.4 mm
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2.87ctw Natural Lemon Yellow Quartz, Flower Cut, Transparent, Photo A

2.87ctw Natural Lemon Yellow Quartz, Flower Cut, Transparent

Quartz

2.87ct total2 pcs
$ 9.43
7.7 x 7.7 mm
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1.26ct Natural Reddish Purple Rhodolite Garnet, Oval, VS, Photo A

1.26ct Natural Reddish Purple Rhodolite Garnet, Oval, VS

Rhodolite Garnet

1.26ct1 pc
$ 33.47
7 x 5 mm (calibrated)
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0.12ct Natural Black Diamond, Square, Opaque, Photo A

0.12ct Natural Black Diamond, Square, Opaque

Diamond

0.12ct1 pc
$ 49.80
2.8 x 2.7 mm
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0.06ct Natural Black Diamond, Square, Opaque, Photo A

0.06ct Natural Black Diamond, Square, Opaque

Diamond

0.06ct1 pc
$ 29.88
1.9 x 1.9 mm
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5.79ctw Natural Swiss Blue Topaz, Heart, VVS, Photo A

5.79ctw Natural Swiss Blue Topaz, Heart, VVS

Topaz

5.79ct total2 pcs
$ 41.23
9 x 9 mm (calibrated)
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1.06ctw Natural Very Light Green Sapphire, Round, VS, Photo A
Sapphire Product Video (592807)

1.06ctw Natural Very Light Green Sapphire, Round, VS

Sapphire

1.06ct total2 pcs
$ 116.13
4 mm (calibrated)
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6.08ct Natural Sangria Violet Amethyst, Pear Shape, Transparent, Photo A

6.08ct Natural Sangria Violet Amethyst, Pear Shape, Transparent

Amethyst

6.08ct1 pc
$ 36.34
13 x 11 mm (calibrated)
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3.37ctw Natural White Zircon, Round, VVS-VS, Photo A

3.37ctw Natural White Zircon, Round, VVS-VS

Zircon

3.37ct total2 pcs
$ 92.31
7 mm (calibrated)
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2.35ct Natural Medium-Light Yellow Beryl, Round, VVS, Photo A

2.35ct Natural Medium-Light Yellow Beryl, Round, VVS

Beryl

2.35ct1 pc
$ 51.49
9 mm (calibrated)
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23.59ct Natural Multicolor Tiger's Eye Matrix, Cushion, Opaque, Photo A

23.59ct Natural Multicolor Tiger's Eye Matrix, Cushion, Opaque

Tiger's Eye Matrix

23.59ct1 pc
$ 10.57
21.4 x 17.8 mm
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Why Buy Square Shape 13x13 Mm Gems from GemSelect?

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
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Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate
Enlarged Gemstone Image