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

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

Source: Bizrate

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

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

Posted By Meow in June, 2023

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 2023

Source: Bizrate

Overall Rating -> 10

Posted By Papa in December, 2023

Source: Bizrate

Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

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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

Source: Bizrate

Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

Posted By Orchidisle in February, 2024

Source: Bizrate

Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

Source: Bizrate

Overall Rating -> 10

Selection ability was straightforward and easy.

Posted By Dave in May, 2023

Source: Bizrate

Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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

Trustworthy site. I've had several good experiences with company. Products always have met my expectations. Thank you.

Posted By Ray in February, 2024

Source: Bizrate

Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

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Gemstones A-Z

Buy Round Shape 13 mm Gems

0.75 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 6.1 x 4.7 mm

0.6 carat Blue Sapphire, Diamond-Cut loose Sapphire from Madagascar, Natural Gem, 5 mm

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

2.7 carat Yellow Citrine, Baguette Cut loose Citrine from Brazil, Natural Untreated Gem, 12.2 x 6.1 mm

1.49 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.1 mm

3.58 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm

1.1 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 6 mm

0.53 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6 x 4 mm

4.97 ct Yellow Moonstone, 13.4 x 8.1 mm Oval Cut From India

1.04 ct Loose Oval Peridot, 6 x 4.2 mm From China

0.75 ct Yellow Sphene, 5.4 x 5.2 mm Oval Cut From Sri Lanka

24.24 ct Yellow Quartz, 19.1 x 18.9 mm Cushion Checkerboard From Brazil

0.54 ct Loose Orange Sapphire, 6.1 x 3.9 mm Oval Cut From Tanzania

2 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.5 x 7 mm

12.1 ct Odd Shaped Druzy Variscite, 35.9 x 14.1 mm From Argentina

23.11 ct Oval Serpentine, 30 x 18.1 mm From the United States

5.8 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9.1 x 8.7 mm

37.96 ct Round Tiger's Eye Matrix, 25.2 mm From Mexico

24.45 ct Baguette Hematite, 19 x 14.8 mm From Brazil

1.78 carat Cushion Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 7.7 x 6.1 mm

0.62 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6.1 x 4.1 mm

6.65 ct Oval Agate, 12.2 x 10.5 mm From Indonesia

4.16 ct Loose Pink Kunzite, 9.2 x 8 mm Cushion Cut From Afghanistan

14.38 ct Gray Jadeite, 19.2 x 11.5 mm Oval Cut From Myanmar

1.13 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.1 x 5.1 mm

1.37 carat Blue Kyanite, Pear Shape loose Kyanite from Nepal, Natural Untreated Gem, 7.9 x 5.5 mm

0.99 carat Orange Spessartite Garnet, Briolette loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 6.1 mm

0.95 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 9.2 x 4.9 mm

0.74 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 6 x 4 mm

5.27 ct Loose Round Cut Sapphire, 2.5 mm From Tanzania

0.55 ct Loose Orange Sapphire, 5.9 x 4 mm Oval Cut From Tanzania

2.79 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 9.9 mm

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