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Home › Calibrated Gemstones › Square Shape 13x13 mm Gems

Calibrated Square Cut Gemstones in Size 13x13 mm

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1.85ct Natural Light Pink Strawberry Quartz, Round, Translucent, Photo A

1.85ct Natural Light Pink Strawberry Quartz, Round, Translucent

Strawberry Quartz

1.85ct1 pc
$ 14.19
8 mm (calibrated)
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3.54ct Natural Multicolor Opal, Oval, Transparent, Photo A

3.54ct Natural Multicolor Opal, Oval, Transparent

Opal

3.54ct1 pc
$ 88.99
14 x 10 mm (calibrated)
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5.27ct Natural Dark Green Malachite, Oval, Opaque, Photo A

5.27ct Natural Dark Green Malachite, Oval, Opaque

Malachite

5.27ct1 pc
$ 8.75
11.7 x 8.6 mm
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9.43ctw Natural Medium-Light Brown Smoky Quartz, Oval, VVS-VS, Photo A

9.43ctw Natural Medium-Light Brown Smoky Quartz, Oval, VVS-VS

Smoky Quartz

9.43ct total2 pcs
$ 13.84
10.9 x 10.1 mm
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0.53ct Natural Light Blue Sapphire, Pear Shape, VVS-VS, Photo A

0.53ct Natural Light Blue Sapphire, Pear Shape, VVS-VS

Sapphire

0.53ct1 pc
$ 51.94
6.5 x 4.9 mm
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0.53ct Natural Sangria Red Pyrope Garnet, Pear Shape, VS, Photo A

0.53ct Natural Sangria Red Pyrope Garnet, Pear Shape, VS

Pyrope Garnet

0.53ct1 pc
$ 13.20
5.2 x 5 mm
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1.26ct Natural Multicolor Opal, Oval, Transparent, Photo A

1.26ct Natural Multicolor Opal, Oval, Transparent

Opal

1.26ct1 pc
$ 31.69
11.2 x 7.4 mm
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2.19ct Natural Light Yellow Quartz, Marquise, VVS, Photo A

2.19ct Natural Light Yellow Quartz, Marquise, VVS

Quartz

2.19ct1 pc
$ 9.62
13 x 7.8 mm
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2.47ctw Natural Dark Golden Sapphire, Round, VVS-VS, Photo A

2.47ctw Natural Dark Golden Sapphire, Round, VVS-VS

Sapphire

2.47ct total5 pcs
$ 162.50
5 mm (calibrated)
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0.96ct Natural Light Purple Spinel, Cushion, VS, Photo A

0.96ct Natural Light Purple Spinel, Cushion, VS

Spinel

0.96ct1 pc
$ 143.42
6.2 x 5.3 mm
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31.03ctw Natural Multicolor Fossil Coral, Oval, Opaque, Photo A

31.03ctw Natural Multicolor Fossil Coral, Oval, Opaque

Fossil Coral

31.03ct total2 pcs
$ 35.36
22.3 x 12.6 mm
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2.67ct Natural Sky Blue Topaz, Octagon / Emerald Cut, VVS, Photo A

2.67ct Natural Sky Blue Topaz, Octagon / Emerald Cut, VVS

Topaz

2.67ct1 pc
$ 20.73
8 x 8 mm (calibrated)
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18.45ctw Natural Grey Hematite, Oval, Opaque, Photo A

18.45ctw Natural Grey Hematite, Oval, Opaque

Hematite

18.45ct total2 pcs
$ 17.99
18.1 x 9.1 mm
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4.64ct Natural Dark Red Rhodolite Garnet, Heart, VVS-VS, Photo A

4.64ct Natural Dark Red Rhodolite Garnet, Heart, VVS-VS

Rhodolite Garnet

4.64ct1 pc
$ 192.56
10.9 x 9.5 mm
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1.37ct Natural Multicolor Opal, Pear Shape, Translucent, Photo A

1.37ct Natural Multicolor Opal, Pear Shape, Translucent

Opal

1.37ct1 pc
$ 52.54
10 x 8 mm (calibrated)
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5.60ct Natural Pearl White Morganite, Oval, VS, Photo A
Morganite Product Video (714764)

5.60ct Natural Pearl White Morganite, Oval, VS

Morganite

5.60ct1 pc
$ 250.99
11.2 x 9.4 mm
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7.28ct Natural Light Basil Green Druzy Variscite, Fancy, Opaque, Photo A

7.28ct Natural Light Basil Green Druzy Variscite, Fancy, Opaque

Druzy Variscite

7.28ct1 pc
$ 7.47
21 x 12.6 mm
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0.57ct Natural Apricot Orange Sapphire, Oval, VS, Photo A

0.57ct Natural Apricot Orange Sapphire, Oval, VS

Sapphire

0.57ct1 pc
$ 34.35
5.6 x 4.3 mm
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28.73ct Natural Multicolor Amethyst Geode Slice, Fancy, Transparent, Photo A

28.73ct Natural Multicolor Amethyst Geode Slice, Fancy, Transparent

Amethyst Geode Slice

28.73ct1 pc
$ 30.62
28.3 x 19 mm
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0.94ct Natural Flamingo Pink Morganite, Pear Shape, VS, Photo A

0.94ct Natural Flamingo Pink Morganite, Pear Shape, VS

Morganite

0.94ct1 pc
$ 82.39
9.2 x 4.9 mm
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8.14ct Natural Earth Green Opal, Oval, Opaque, Photo A

8.14ct Natural Earth Green Opal, Oval, Opaque

Opal

8.14ct1 pc
$ 17.43
16.6 x 14.3 mm
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1.71ct Natural Medium Orange Zircon, Round, VVS-VS, Photo A

1.71ct Natural Medium Orange Zircon, Round, VVS-VS

Zircon

1.71ct1 pc
$ 37.47
6.5 mm (calibrated)
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46.91ct Natural Multicolor Rhodochrosite, Oval, Opaque, Photo A

46.91ct Natural Multicolor Rhodochrosite, Oval, Opaque

Rhodochrosite

46.91ct1 pc
$ 112.60
35.1 x 19.2 mm
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2.06ct Natural Pale Reddish Orange Andesine Labradorite, Oval, Transparent/Translucent, Photo A

2.06ct Natural Pale Reddish Orange Andesine Labradorite, Oval, Transparent/Translucent

Andesine Labradorite

2.06ct1 pc
$ 27.08
9 x 7 mm (calibrated)
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1.25ctw Natural Golden Citrine, Oval, Transparent, Photo A

1.25ctw Natural Golden Citrine, Oval, Transparent

Citrine

1.25ct total2 pcs
$ 8.72
10.1 x 4.1 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
$ 4.81
6 x 6 mm (calibrated)
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6.80ct Natural Medium-Light Pink Strawberry Quartz, Oval, Translucent, Photo A
Strawberry Quartz Product Video (555883)

6.80ct Natural Medium-Light Pink Strawberry Quartz, Oval, Translucent

Strawberry Quartz

6.80ct1 pc
$ 42.76
14.5 x 11.4 mm
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1.98ct Natural Deep Blood Red Almandine Garnet, Oval, VS, Photo A

1.98ct Natural Deep Blood Red Almandine Garnet, Oval, VS

Almandine Garnet

1.98ct1 pc
$ 73.95
9 x 7 mm (calibrated)
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46.78ct Natural Medium Green Uvarovite Garnet Drusy, Fancy, Opaque, Photo A

46.78ct Natural Medium Green Uvarovite Garnet Drusy, Fancy, Opaque

Uvarovite Garnet Drusy

46.78ct1 pc
$ 69.89
32.7 x 23.6 mm
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4.29ct Natural Light Pear Green Prehnite, Pear Shape, Transparent, Photo A

4.29ct Natural Light Pear Green Prehnite, Pear Shape, Transparent

Prehnite

4.29ct1 pc
$ 11.74
9 x 9 mm (calibrated)
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1.77ct Natural Light Brown Color-Change Garnet, Pear Shape, VS-SI, Photo A
Color-Change Garnet Product Video (344767)

1.77ct Natural Light Brown Color-Change Garnet, Pear Shape, VS-SI

Color-Change Garnet

1.77ct1 pc
$ 158.66
10.5 x 6 mm
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6.82ct Natural Very Light Brown Smoky Quartz, Flower Cut, Transparent/Translucent, Photo A

6.82ct Natural Very Light Brown Smoky Quartz, Flower Cut, Transparent/Translucent

Smoky Quartz

6.82ct1 pc
$ 15.84
13 x 13 mm (calibrated)
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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

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
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Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
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Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate
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