Buy 13 mm Round Calibrated Gemstones from GemSelect

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 Round shapes, facet cut and cabochon gems available now in 13 mm diameter 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 usually 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 -> 9

GemSelect has a fantastic assortment of Semi-precious stones. I have not found any other web site with the variety you have.

Posted By RobDill in August, 2023

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Overall Rating -> 10

great. thank you

Posted By Carrotroller in July, 2023

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Overall Rating -> 9

My first purchase went well. I will purchase more gems in the future.

Posted By NoHalalAl in March, 2024

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Overall Rating -> 10

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

Posted By Teemo in February, 2024

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Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 2023

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Overall Rating -> 10

The website is easy to navigate and the images are incredible.

Posted By Lindsy 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

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Overall Rating -> 10

The site is very easy to use and I will continue to shop here. The quality is superb

Posted By Genia in January, 2024

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Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

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Overall Rating -> 9

The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

Posted By Kasper in June, 2023

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Overall Rating -> 10

Easy to use as always and in all steps from opening site to paying.

Posted By Pete in February, 2024

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

Easy to find products I want. I've ordered several times from gem select and never any problems. Will order again. Thank you.

Posted By Ray in January, 2024

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Overall Rating -> 10

I enjoyed browsing though different varieties of rubies. I felt that the experience was simple and easy to navigate!

Posted By Daws in July, 2023

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Overall Rating -> 10

the searching format was easy to find what i needed. It helped to be able to sort Lowest price to Highest because i wasnt looking to spend too much but i did want an actual stone and not imitation.

Posted By PixelComposer in January, 2024

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Gemstones A-Z

Buy Round Shape 13 mm Gems

0.94 ct Cushion Cut Color-Change Diaspore, 6.7 x 5.1 mm From Turkey

0.93 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 6.9 x 6.9 mm

49.65 ct Pencil Cut Rainbow Moonstone, 42.3 x 11.9 mm From the United States

27.2 carat Round Ammolite, loose Certified Ammolite from Canada, Natural Gem, 23.9 mm

0.46 ct Loose Yellow Sapphire, 4 x 4 mm Square Cut From Tanzania

1.57 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5.1 mm

1.5 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gems, 5 mm

0.72 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gems, 5 x 4 mm

0.91 ct Oval Cut Peridot, 7.2 x 5.1 mm From China

5.92 ct Oval Black Opal, 16.1 x 12.5 mm From Ethiopia

3.96 ct Round Star Diopside, 9.1 mm From India

1.56 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.5 x 3.3 mm

5.34 ct Asscher Cut Rose Quartz, 11 x 10.9 mm From South Africa

18.58 ct Fancy Rainbow Moonstone, 25 x 13.8 mm From the United States

0.97 ct Blue Kyanite, 5.8 mm Round Cut From Nepal

0.5 ct Purple Spinel, 5.1 mm Round Cut From Tanzania

0.33 carat Oval Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 5.4 x 3.9 mm

3.4 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 8.3 mm

17.5 ct Druzy Citrine, 20.1 x 14.4 mm From Uruguay

0.5 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.9 x 4 mm

3.39 carat Heart Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 6 mm

1.39 ct Loose Orange Sapphire, 5.1 mm Round Cut From Tanzania

1.91 ct Oval Cut Andalusite, 6 x 4.1 mm From Brazil

5.87 ct Pink Kunzite, 10.7 x 10.9 mm Octagon Cut From Afghanistan

1.42 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 10.1 x 8 mm

2.62 ct Green Agate, 15.1 x 8.7 mm Carved From India

80.36 ct Oval Chrysocolla, 51.7 x 25.3 mm From Australia

0.35 ct Round Chrysoberyl Cat's Eye, 4.1 mm From Sri Lanka

3.79 ct Pink Kunzite, 11.7 x 5.8 mm Octagon Cut From Afghanistan

1.1 carat Blue Sapphire, Diamond-Cut loose Sapphire from Madagascar, Natural Gems, 5 mm

3.35 carat Pear Larimar, loose Certified Larimar from the Dominican Republic, Natural Untreated Gem, 13.1 x 9.2 mm

5.42 ct Oval Tiger's Eye, 14.1 x 10.1 mm From India

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