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 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

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

Very Good

Posted By Julian in July, 2023

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 -> 9

I was in the market for birthstones for a lil gift project im doing. I'm no expert in gems or what not but the quality as far as i can tell seems to be spot on.

Posted By PixelComposer in January, 2024

Source: Bizrate

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

Super easy to do business for great products.

Posted By BoBBy in January, 2024

Source: Bizrate

Overall Rating -> 10

I FOUND WHAT I WANT IT

Posted By GABY in March, 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

Awesome

Posted By Mic in May, 2023

Source: Bizrate

Overall Rating -> 10

blessed be the lord blessed be the saved blessed be the work blessed be the traveled i write down my good times in these stones and when times are gray i can still se the sunny days refract in these stones

Posted By Kickbass.2 in May, 2023

Source: Bizrate

Overall Rating -> 10

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

Posted By Happiness in January, 2024

Source: Bizrate

Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

Source: Bizrate

Overall Rating -> 10

Great experience! First time buyer

Posted By Todi89 in February, 2024

Source: Bizrate

Overall Rating -> 9

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

Posted By NoHalalAl in March, 2024

Source: Bizrate

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Gemstones A-Z

Buy Round Shape 13 mm Gems

11.48 ct Amethyst Geode Slice, 18.9 x 13.2 mm From Brazil

4.82 ct Oval Prehnite, 6.8 x 5.2 mm From South Africa

1.38 ct Blue Star Sapphire, 7.2 x 5.3 mm Oval Cut From Thailand

4.7 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6.9 x 5.1 mm

1.05 ct Cushion Cut Color-Change Diaspore, 6.7 x 6 mm From Turkey

4.02 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.2 x 9.8 mm

6.65 ct Carved Prehnite, 15.5 x 11 mm From South Africa

6.72 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 14 x 10.1 mm

6.57 ct Oval Malachite, 13.8 x 9.5 mm From Congo

0.89 ct Loose Round Cut Lapis Lazuli, 6.1 mm From Afghanistan

0.6 carat Purple Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6.6 x 4.5 mm

8.54 carat Black Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 13.6 x 11.7 mm

6.43 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm

1.05 carat Pear Shape Black Opal, loose Certified Black Opal from Ethiopia, Natural Gem, 10.9 x 6.2 mm

9.76 ct Black Spinel, 10.2 mm Round Rose Cut From Thailand

2.15 carat Princess-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8 x 7.9 mm

27.43 ct Carved Rubellite Tourmaline, 18 x 14.1 mm From Mozambique

1.96 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gem, 8.2 mm

2.6 ct Oval Strawberry Quartz, 9.1 x 7.2 mm From Russia

2.91 ct Loose Yellow Sapphire, 5.8 x 4.8 mm Oval Cut From Tanzania

12.68 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gems, 17.7 x 11.2 mm

4.02 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 9 mm

8.19 ct Round Checkerboard Labradorite, 12.2 mm From Madagascar

1.34 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 x 5.1 mm

3.62 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.2 x 8.3 mm

8.08 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gems, 8.2 x 6.2 mm

1.38 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.4 x 6.1 mm

0.92 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.1 x 4.1 mm

1.11 carat Green Sapphire, Oval loose Sapphire from Madagascar, Natural Gem, 7.2 x 5.2 mm

5.37 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 7.2 x 5.2 mm

0.7 ct Oval Cut Fire Opal, 8 x 6.2 mm From Mexico

1.68 ct Blue Kyanite, 7.2 x 4.9 mm Oval Cut From Nepal

Gemstone Information

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Gemstone EDUCATION

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