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Home › Calibrated Gemstones › Square Shape 13x13 mm Gems

Calibrated Square Cut Gemstones in Size 13x13 mm

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2.08ct Natural Medium Violet Amethyst, Trillion, VS, Photo A

2.08ct Natural Medium Violet Amethyst, Trillion, VS

Amethyst

2.08ct1 pc
$ 15.95
9 x 9 mm (calibrated)
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8.13ctw Natural Swiss Blue Topaz, Octagon / Emerald Cut, VS, Photo A

8.13ctw Natural Swiss Blue Topaz, Octagon / Emerald Cut, VS

Topaz

8.13ct total4 pcs
$ 56.68
8 x 6 mm (calibrated)
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3.58ctw Natural Dark Golden Citrine, Square, VS, Photo A

3.58ctw Natural Dark Golden Citrine, Square, VS

Citrine

3.58ct total2 pcs
$ 24.87
7 x 7 mm (calibrated)
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0.59ct Natural Multicolor Opal, Oval, Opaque, Photo A

0.59ct Natural Multicolor Opal, Oval, Opaque

Opal

0.59ct1 pc
$ 17.63
7 x 5 mm (calibrated)
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0.55ct Natural Bright Green Peridot, Marquise, VS, Photo A

0.55ct Natural Bright Green Peridot, Marquise, VS

Peridot

0.55ct1 pc
$ 8.22
8 x 4 mm (calibrated)
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4.69ct Natural Deep Violet Amethyst, Pear Shape, VVS, Photo A

4.69ct Natural Deep Violet Amethyst, Pear Shape, VVS

Amethyst

4.69ct1 pc
$ 30.83
14 x 10 mm (calibrated)
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1.28ct Natural Multicolor Black Opal, Oval, Opaque, Photo A

1.28ct Natural Multicolor Black Opal, Oval, Opaque

Black Opal

1.28ct1 pc
$ 33.66
9 x 7 mm (calibrated)
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1.44ct Natural Orange Pink Tourmaline, Octagon / Emerald Cut, VVS-VS, Photo A

1.44ct Natural Orange Pink Tourmaline, Octagon / Emerald Cut, VVS-VS

Tourmaline

1.44ct1 pc
$ 108.86
9.4 x 4.1 mm
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0.84ctw Natural Golden Sapphire, Heart, VS, Photo A

0.84ctw Natural Golden Sapphire, Heart, VS

Sapphire

0.84ct total2 pcs
$ 51.88
4.7 x 4.7 mm
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0.47ct Natural Medium Pink Sapphire, Oval, VVS, Photo A

0.47ct Natural Medium Pink Sapphire, Oval, VVS

Sapphire

0.47ct1 pc
$ 47.12
6 x 4 mm (calibrated)
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1.30ct Natural Light Greenish Yellow Sphene, Oval, Transparent, Photo A

1.30ct Natural Light Greenish Yellow Sphene, Oval, Transparent

Sphene

1.30ct1 pc
$ 6.47
6.5 x 5.3 mm
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0.49ct Natural Bluish White Sapphire, Heart, VS, Photo A

0.49ct Natural Bluish White Sapphire, Heart, VS

Sapphire

0.49ct1 pc
$ 34.16
4.7 x 4.6 mm
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7.49ctw Natural White Zircon, Oval, VVS-VS, Photo A

7.49ctw Natural White Zircon, Oval, VVS-VS

Zircon

7.49ct total10 pcs
$ 49.24
6 x 4 mm (calibrated)
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0.83ct Natural Medium Pink Morganite, Pear Shape, VVS, Photo A

0.83ct Natural Medium Pink Morganite, Pear Shape, VVS

Morganite

0.83ct1 pc
$ 34.45
8 x 6 mm (calibrated)
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0.81ct Natural Intense Purple Sapphire, Fancy, VVS, Photo A

0.81ct Natural Intense Purple Sapphire, Fancy, VVS

Sapphire

0.81ct1 pc
$ 90.25
7.1 x 5.8 mm
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6.41ct Natural Medium Green Malachite, Oval, Opaque, Photo A

6.41ct Natural Medium Green Malachite, Oval, Opaque

Malachite

6.41ct1 pc
$ 12.77
11.6 x 8.9 mm
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1.55ct Natural Bluish White Rainbow Moonstone, Oval, Transparent, Photo A

1.55ct Natural Bluish White Rainbow Moonstone, Oval, Transparent

Rainbow Moonstone

1.55ct1 pc
$ 50.96
9 x 7 mm (calibrated)
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2.13ctw Natural White Zircon, Oval, VVS-VS, Photo A

2.13ctw Natural White Zircon, Oval, VVS-VS

Zircon

2.13ct total2 pcs
$ 12.62
7 x 5 mm (calibrated)
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4.57ct Natural Medium Golden Citrine, Oval, VS, Photo A
Citrine Product Video (559916)

4.57ct Natural Medium Golden Citrine, Oval, VS

Citrine

4.57ct1 pc
$ 35.05
12 x 10 mm (calibrated)
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0.51ct Natural Medium Orange Sapphire, Oval, VVS-VS, Photo A

0.51ct Natural Medium Orange Sapphire, Oval, VVS-VS

Sapphire

0.51ct1 pc
$ 51.61
6 x 4 mm (calibrated)
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5.26ct Natural Golden Citrine, Oval, VVS, Photo A

5.26ct Natural Golden Citrine, Oval, VVS

Citrine

5.26ct1 pc
$ 34.58
13.8 x 10.5 mm
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1.00ct Natural Flamingo Pink Morganite, Pear Shape, VVS-VS, Photo A

1.00ct Natural Flamingo Pink Morganite, Pear Shape, VVS-VS

Morganite

1.00ct1 pc
$ 109.56
9.6 x 5.2 mm
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1.46ct Natural Medium Orange Hessonite Garnet, Oval, VS, Photo A

1.46ct Natural Medium Orange Hessonite Garnet, Oval, VS

Hessonite Garnet

1.46ct1 pc
$ 29.08
7.6 x 6.3 mm
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0.39ct Natural Bright Orange Sapphire, Pear Shape, VS, Photo A

0.39ct Natural Bright Orange Sapphire, Pear Shape, VS

Sapphire

0.39ct1 pc
$ 41.23
5.7 x 4 mm
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11.55ct Natural Swiss Blue Topaz, Pear Shape, Transparent, Photo A
Topaz Product Video (486263)

11.55ct Natural Swiss Blue Topaz, Pear Shape, Transparent

Topaz

11.55ct1 pc
$ 113.89
17.9 x 11.9 mm
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2.61ctw Natural Olive Green Sphene, Oval, Transparent, Photo A

2.61ctw Natural Olive Green Sphene, Oval, Transparent

Sphene

2.61ct total2 pcs
$ 13.00
6.8 x 6.1 mm
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12.83ct Natural Bright Blue Color-Change Fluorite, Round, VS, Photo A

12.83ct Natural Bright Blue Color-Change Fluorite, Round, VS

Color-Change Fluorite

12.83ct1 pc
$ 351.42
14 mm (calibrated)
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1.71ct Natural Reddish Orange Moonstone, Trillion, Translucent, Photo A

1.71ct Natural Reddish Orange Moonstone, Trillion, Translucent

Moonstone

1.71ct1 pc
$ 3.40
8 x 8 mm (calibrated)
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2.95ctw Natural White Topaz, Cushion, VVS-VS, Photo A

2.95ctw Natural White Topaz, Cushion, VVS-VS

Topaz

2.95ct total6 pcs
$ 16.17
4.6 x 4.6 mm
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3.15ct Natural Multicolor Mystic Quartz, Oval, VVS, Photo A

3.15ct Natural Multicolor Mystic Quartz, Oval, VVS

Mystic Quartz

3.15ct1 pc
$ 21.96
11 x 9 mm (calibrated)
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18.31ct Natural Silver Gray Hematite, Pear Shape, Opaque, Photo A

18.31ct Natural Silver Gray Hematite, Pear Shape, Opaque

Hematite

18.31ct1 pc
$ 17.86
25 x 18 mm (calibrated)
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27.39ct Natural Warm White Scolecite, Cushion, Opaque, Photo A

27.39ct Natural Warm White Scolecite, Cushion, Opaque

Scolecite

27.39ct1 pc
$ 32.72
26.2 x 24 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

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
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