Buy 11 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 11 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 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

I’ve enjoyed purchasing stones from this site. It’s convenient and fairly priced.

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Overall Rating -> 10

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Overall Rating -> 10

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Overall Rating -> 10

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Overall Rating -> 10

Very large selection of items and we used the stones to have several pieces of jewelry made for us.

Posted By Joe in January, 2024

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Overall Rating -> 10

I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

Posted By Oakcityceo in May, 2023

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Overall Rating -> 10

first time here sooooooooooo we will seeeee!!!!! so far so good!!!!!!

Posted By Seastone 56 in October, 2023

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Overall Rating -> 10

Perfect size I was looking for and great price

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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

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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

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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

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Overall Rating -> 9

It went well

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Overall Rating -> 10

After having looked at other purchasing sites, this is my first choice.

Posted By MJC in January, 2024

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Overall Rating -> 10

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Posted By Mk in November, 2023

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Gemstones A-Z

Buy Round Shape 11 mm Gems

0.57 ct Loose Yellow Sapphire, 6 x 4.1 mm Octagon Cut From Tanzania

9.52 ct Carved Rose Quartz, 16.1 x 16 mm From Brazil

5.7 ct Carved Prehnite, 17 x 10.2 mm From South Africa

1.16 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 6.6 x 5 mm

8.43 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 11.1 x 9 mm

3.54 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12.2 x 10.1 mm

2.47 ct Loose Baguette Labradorite, 9.3 x 7.1 mm From Madagascar

5.33 ct Blue Green Apatite, 12.5 x 8.9 mm Oval Cut From Madagascar

12.19 carat Trillion Ammolite, loose Certified Ammolite from Canada, Natural Gem, 26.3 x 13.6 mm

1.42 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.1 x 6.1 mm

1.22 ct Yellow Sphalerite, 6 mm Round Cut From Spain

0.44 carat Green Sapphire, Emerald-Cut loose Sapphire from Tanzania, Natural Gem, 5.1 x 3.3 mm

34.97 ct Green Aventurine, 40.7 x 10.3 mm Pencil Cut From Brazil

2.04 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10.2 x 5 mm

4.58 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14 x 9.9 mm

1.68 ct Oval Cut Peridot, 8.5 x 6.3 mm From China

1.27 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 4.3 x 3.5 mm

21.72 ct Oval Fossil Coral, 19.8 x 12.8 mm From Indonesia

3.42 ct Round Labradorite, 7.2 mm From Madagascar

41.15 ct Green Jadeite, 27.5 x 21 mm Oval Cut From Myanmar

1.02 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 7.4 x 5.2 mm

2.39 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gems, 9.1 x 7 mm

3.31 ct Loose Oval Agate, 9.7 x 8.8 mm From Indonesia

0.84 ct Loose Violet Sapphire, 6 x 5.1 mm Oval Cut From Tanzania

22.95 ct Green Amazonite, 35.6 mm Pencil Cut From Madagascar

1.06 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.7 x 4.9 mm

1.01 carat Marquise Cut Opal, loose Certified Opal from Ethiopia, Natural Gem, 15.9 x 6.2 mm

43.18 carat Pear Tiger's Eye Matrix, loose Certified Tiger's Eye Matrix from Mexico, Natural Untreated Gem, 28.6 x 24.8 mm

1.24 carat Pear Shape Ruby, loose Certified Ruby from Myanmar, Natural Gem, 6.8 x 6 mm

1.17 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 13.7 x 3.4 mm

1.24 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.1 x 4.1 mm

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

Gemstone Information

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