Buy 6.5 mm Round Calibrated Gemstones from GemSelect

Some people buy 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 6.5 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 even slightly higher. 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 -> 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

Source: Bizrate

Overall Rating -> 10

Great selection, I love your site! Great product visibility, information, etc.

Posted By John in February, 2024

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

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

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 found it to be easy to browse and easy to use

Posted By Kyle in December, 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 -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

Source: Bizrate

Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

Source: Bizrate

Overall Rating -> 10

I purchase all of my stones from GemSelect! They're the best I've found for both selection and value.

Posted By Terry in June, 2023

Source: Bizrate

Overall Rating -> 9

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

Posted By Mr. Bezel in July, 2023

Source: Bizrate

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

Perfect size I was looking for and great price

Posted By Izzy in September, 2023

Source: Bizrate

Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

Source: Bizrate

Overall Rating -> 10

I love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

Posted By Cahall in March, 2024

Source: Bizrate

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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

2.08 ct Blue Kyanite, 8.1 x 6.1 mm Oval Cut From Nepal

3.39 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 11.8 x 5.9 mm

1.52 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 10.3 x 4.5 mm

18.42 ct Druzy Citrine, 19 x 10.9 mm From Uruguay

3.94 ct Yellow Quartz, 9.3 x 9.3 mm Asscher Cut From Brazil

0.3 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 4.1 mm

1.59 ct Oval Black Opal, 8 x 5.9 mm From Ethiopia

0.91 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gem, 5.9 x 5 mm

1.47 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 9 x 7 mm

0.8 ct Octagon Cut Color-Change Diaspore, 5.5 x 5 mm From Turkey

4.29 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.1 x 8.1 mm

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

34.19 ct Fancy Dendritic Agate, 33.5 x 25.1 mm From India

2.39 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.9 x 3.9 mm

3.36 ct Green Agate, 9.8 x 8.8 mm Oval Cut From India

5.78 ct Oval Prehnite, 8.8 x 7.5 mm From South Africa

1.42 ct Oval Sillimanite Cat's Eye, 6.5 x 6.4 mm From Madagascar

0.49 ct Loose Yellow Sapphire, 4.5 x 4.4 mm Heart Cut From Tanzania

1.92 ct Orange Moonstone, 7.2 x 7 mm Square Cut From India

0.6 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.8 x 5 mm

0.51 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.8 x 3.9 mm

21.4 carat Carved Rose Mother of Pearl, loose Certified Mother of Pearl from China, Natural Gem, 26.8 x 17 mm

0.37 ct Loose Orange Sapphire, 5 x 2.6 mm Marquise Cut From Tanzania

1.65 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 9.1 x 5.1 mm

19.78 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18.2 x 14.1 mm

1.43 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 7 x 4.9 mm

4.67 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 9.1 x 7.1 mm

4.35 ct Pink Morganite, 15.3 x 9.2 mm Carved From Afghanistan

26 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 20.2 mm

0.52 carat London Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 7 x 3.6 mm

5.63 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9 x 8.9 mm

8.06 carat Blue Zircon, Pear Shape loose Zircon from Cambodia, Natural Gem, 13.9 x 9.7 mm

Gemstone Information

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