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

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

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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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

No issues at all. It was great.

Posted By LJXK in May, 2023

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Overall Rating -> 10

Great site

Posted By Lord of Bananas in November, 2023

Source: Bizrate

Overall Rating -> 10

Easy to navigate

Posted By G Funk in December, 2023

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Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

Overall Rating -> 9

Well presented images, clear information, quick and easy check out.

Posted By Mr. Bezel in July, 2023

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Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 2023

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Overall Rating -> 10

Website was incredibly easy and fast to use. Navigation and product outlay was simple and enjoyable to browse. Thank you and have a blessed day!

Posted By Devi in October, 2023

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Overall Rating -> 10

Very easy. I have purchased a few times before and was satisfied each time. Thank you.

Posted By Ray in December, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

Source: Bizrate

Overall Rating -> 10

Everything fine.

Posted By Hilario in December, 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

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Gemstones A-Z

Buy Round Shape 13 mm Gems

1.47 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.4 x 3.6 mm

3.26 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

3.4 ct Round Checkerboard Smoky Quartz, 7.9 mm From Brazil

19.24 ct Green Aventurine, 21.2 x 10.2 mm Odd Shaped From Brazil

5.39 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 10.1 x 8.1 mm

6.34 ct Odd Shaped Hemimorphite Druzy, 13.8 x 9.9 mm From Congo

3.46 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gem, 10 x 8.1 mm

2.74 ct Blue Star Sapphire, 7.1 x 5.2 mm Oval Cut From Thailand

22.77 ct Gray Jadeite, 26.3 x 14.3 mm Oval Cut From Myanmar

25.34 ct Pencil Cut Jasper, 37.2 mm From India

1.12 ct Marquise Cut Peridot, 8.1 x 4.1 mm From China

12.76 carat Brown Pearl, Ball loose Pearl from South Sea, Natural Gem, 12.2 mm

0.1 ct Black Diamond, 2.1 mm Diamond Cut From India

2.49 ct Round Cut Rainbow Moonstone, 9.1 mm From the United States

2.62 ct Oval Tiger's Eye, 10 x 7.8 mm From Thailand

0.36 ct Loose Orange Sapphire, 4.8 x 2.5 mm Marquise Cut From Tanzania

1.37 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6 x 5.9 mm

2.28 carat White Zircon, Round loose Zircon from Cambodia, Natural Gem, 6.7 mm

1.03 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 6.8 x 5 mm

36.98 ct Cushion Bloodstone, 31 x 25.1 mm From Madagascar

17.45 carat Pear Jasper, loose Certified Jasper from Mexico, Natural Untreated Gem, 29.2 x 14.1 mm

2.51 carat Round Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 4.7 mm

10.9 ct Purple Kunzite, 15.4 x 11.1 mm Cushion Cut From Afghanistan

13.4 ct Carved Prehnite, 15.5 x 12.4 mm From South Africa

7.28 ct Asscher Cut Rose Quartz, 12 x 11.9 mm From South Africa

1.22 carat Pear Shape Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 7.6 x 5.2 mm

0.97 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 7 x 6.9 mm

40.05 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 40.5 x 23.8 mm

4.46 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 11.9 x 6.1 mm

6.6 carat Round Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.5 mm

0.88 ct Loose Oval Cut Black Opal, 9.3 x 7.1 mm From Ethiopia

6.76 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 12.3 x 8.3 mm

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