Calibrated Square Cut Gemstones in Size 13x13 mm

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Square shapes, facet cut and cabochon gems available now in 13 mm x 13 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not meant nor expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often around 0.3 mm or slightly higher even. This small variance can usually be accommodated for standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

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Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

Posted By Jf in January, 2024

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Overall Rating -> 10

Selection ability was straightforward and easy.

Posted By Dave in May, 2023

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Overall Rating -> 10

Great selection and excellent website.

Posted By JBW in October, 2023

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Overall Rating -> 10

Excellent site.

Posted By Boru in December, 2023

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Overall Rating -> 10

Perfect size I was looking for and great price

Posted By Izzy in September, 2023

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Overall Rating -> 7

I feel pretty good so far, pending the delivery of the item ordered.

Posted By Steve in November, 2023

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Overall Rating -> 10

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

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Overall Rating -> 10

Excellent selection of products. Website easy to navigate and make purchases.

Posted By David in April, 2023

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Overall Rating -> 10

Everything was fine.

Posted By Matt in March, 2024

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Overall Rating -> 10

My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

Posted By Spinach in May, 2023

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Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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Overall Rating -> 10

The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

Posted By T-bone in October, 2023

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

Source: Bizrate

Overall Rating -> 10

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

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Overall Rating -> 10

Hello: You do have good website. Vast majority of folks would buy the Gems for its spiritual, physical / energy level, emotional level positive aspects. You have only very brief mention of this aspect of each Gem ..may be you can add little bit more about ways to leverage the beneificial effect of each gems i.e. some practical tips.ThanksRupen Patel

Posted By EarthDeep in February, 2024

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Gemstones A-Z

Buy Square Shape 13x13 mm Gems

2.98 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gems, 7 x 6.9 mm

0.77 carat Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.3 x 5.1 mm

11.86 ct Octagon Cut Smoky Quartz, 14.5 x 14.5 mm From Brazil

5.18 ct Loose Oval Pietersite, 13.8 x 9.7 mm From Namibia

2.47 ct Oval Strawberry Quartz, 9.1 x 7.1 mm From Russia

3.74 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.7 x 10.2 mm

31.3 ct Brown Moonstone, 22 x 16.1 mm Oval Cut From India

2.3 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5 mm

27.44 ct Loose Blue Green Turquoise, 22.3 x 15.2 mm Oval Cut From the United States

3.55 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 5.9 x 4.1 mm

0.44 ct Blue Kyanite, 3.5 mm Round Cut From Nepal

38.75 carat Pear Ruby-Zoisite, loose Certified Ruby-Zoisite from Tanzania, Natural Untreated Gem, 30.6 x 26.2 mm

1.24 ct Loose Princess Cut Sapphire, 2.3 x 2.2 mm From Tanzania

1.15 ct Oval Cut Peridot, 7.9 x 5.6 mm From China

12.71 carat Pear Shape Smoky Quartz, loose Certified Smoky Quartz from Brazil, Natural Untreated Gems, 14.9 x 11 mm

2.16 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6 x 4.4 mm

0.57 carat Green Sapphire, Heart loose Sapphire from Tanzania, Natural Gem, 4.6 x 4.5 mm

0.98 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4.1 mm

0.8 ct Round Labradorite, 5.1 mm From Madagascar

0.14 ct Yellow Diamond, 3.2 mm Diamond Cut From India

1.16 ct Loose Yellow Sapphire, 4.8 mm Round Cut From Tanzania

4.92 ct Loose Pear Dendritic Agate, 13.9 x 10.2 mm From India

2.6 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9.3 x 7.6 mm

28.12 ct Cushion Coral, 18.7 x 13.5 mm From Indonesia

1.1 carat Blue Sapphire, Marquise-Cut loose Sapphire from Madagascar, Natural Gem, 9 x 4.8 mm

1.04 ct Loose Trillion Cut Sapphire, 6.3 x 6 mm From Madagascar

17.95 carat Carved Rose Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18.4 x 17.8 mm

5.99 ct Fancy Fire Agate, 12.3 x 10.8 mm From Mexico

3.43 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 9 mm

1.66 carat Square Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 6.9 x 6.9 mm

1.37 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 6.1 x 6.1 mm

2.79 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.1 x 8.7 mm

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