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 -> 10

Todo muy bien en la compra ahora esperar recibir el pedido.

Posted By MAGSMX in August, 2023

Source: Bizrate

Overall Rating -> 10

Pleasant.

Posted By Mk in November, 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

Source: Bizrate

Overall Rating -> 10

Interested in unusual stones and found many that I purchased or will purchase in the near future. I have been a customer of gem select for almost ten years and have always been pleased with buying experience and the delivered product

Posted By Fairhope Pete in December, 2023

Source: Bizrate

Overall Rating -> 10

Great experience! First time buyer

Posted By Todi89 in February, 2024

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Overall Rating -> 10

It was easy to navigate and I hope that the gem is as nice as the picture

Posted By 1 in April, 2024

Source: Bizrate

Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

Source: Bizrate

Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

Posted By Jrplunk in April, 2024

Source: Bizrate

Overall Rating -> 10

I loved the opportunity to shop on a website that I could trust 👍

Posted By Will J. Lover in September, 2023

Source: Bizrate

Overall Rating -> 10

Fine. All emails answered. Excellent service. Nice discount added for orders. Briefly, a very good experience.

Posted By C.J. in February, 2024

Source: Bizrate

Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

Posted By Iggywiggly in January, 2024

Source: Bizrate

Overall Rating -> 10

Love the variety of stones, sizes and the prices

Posted By Dorita in March, 2024

Source: Bizrate

Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

Source: Bizrate

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

Source: Bizrate

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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Gemstones A-Z

Buy Round Shape 13 mm Gems

20.54 ct Oval Fossil Coral, 18.1 x 12.8 mm From Indonesia

2.91 ct Oval Prehnite, 7.3 x 6.2 mm From South Africa

5.23 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 10.1 x 8.1 mm

21.49 ct Oval Serpentine, 25.5 x 17.8 mm From the United States

1.17 ct Purple Spinel, 5.9 x 5.6 mm Cushion Cut From Tanzania

1.58 ct Green Sphene, 6.8 x 6.3 mm Oval Cut From Sri Lanka

0.88 ct Octagon Cut Smoky Quartz, 10.1 x 4 mm From Brazil

2.93 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6 x 4.1 mm

8.52 ct Yellow Apatite, 15.8 x 11.8 mm Oval Cut From Madagascar

11.06 ct Oval Larimar, 14.3 x 10 mm From the Dominican Republic

2.86 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gem, 8.9 x 8.7 mm

55.24 ct Loose Oval Bloodstone, 32.2 x 22.3 mm From Madagascar

3.82 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12.1 x 6 mm

0.68 ct Loose Yellow Sapphire, 4.3 x 4.3 mm Square Cut From Tanzania

1.56 ct Purple Spinel, 6.9 x 6.4 mm Cushion Cut From Tanzania

1.47 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 11.3 x 4.3 mm

1.23 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.2 x 7.2 mm

3.48 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 9.2 mm

23.92 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 20.3 mm

2.47 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.3 x 10.8 mm

1.45 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6.7 mm

0.47 ct Loose Purple Sapphire, 5.1 x 4.1 mm Oval Cut From Madagascar

2.14 ct Oval Prehnite, 8.5 x 7.2 mm From South Africa

6.7 carat Yellow Citrine, Briolette loose Citrine from Brazil, Natural Untreated Gem, 14.3 mm

2.63 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 4.2 mm

1.8 ct Oval Sillimanite Cat's Eye, 7.1 x 4.4 mm From Madagascar

3.86 ct Green Apatite, 9.6 x 9.3 mm Asscher Cut From Madagascar

1.48 carat Square Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5 x 5 mm

3.07 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.5 mm

23.21 ct Odd Shaped Jasper, 29.5 x 16.6 mm From India

6.95 ct Asscher Cut Rose Quartz, 11.8 x 11.7 mm From South Africa

0.17 ct Blue Apatite, 3.4 mm Round Cut From Madagascar

Gemstone Information

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