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 -> 10

this was very easy im exited to get my order

Posted By Mr. in April, 2024

Source: Bizrate

Overall Rating -> 10

I find the website user friendly.

Posted By Becky in August, 2023

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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

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Overall Rating -> 10

Great selection

Posted By GHS40 in December, 2023

Source: Bizrate

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

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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

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Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

Posted By GemGrammy in January, 2024

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Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

Source: Bizrate

Overall Rating -> 10

Interested in unusual stones and found many that I purchased or will purchase in the near future. I have been a customer of gem select for almost ten years and have always been pleased with buying experience and the delivered product

Posted By Fairhope Pete in December, 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 -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

Posted By Iggywiggly in January, 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

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

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

Posted By Teemo in February, 2024

Source: Bizrate

Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

Source: Bizrate

Gemstones A-Z

Buy Round Shape 6.5 mm Gems

1.83 ct Round Cut Peridot, 4 mm From China

1.14 ct Round Labradorite, 5 mm From Madagascar

19.55 ct Cushion Obsidian, 22.7 x 17.4 mm From India

8.8 ct Yellow Quartz, 19.2 x 8.2 mm Octagon Cut From Brazil

2.97 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gems, 7 x 6.9 mm

14.5 ct Oval Rose Quartz, 16.5 x 14.4 mm From South Africa

3.76 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 14.8 x 9.1 mm

1.55 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 4.9 x 3.1 mm

108.15 ct Oval Cut Rose Quartz, 37.9 x 26.2 mm From South Africa

0.22 ct Octagon Cut Iolite, 5.1 x 2.8 mm From Madagascar

2.62 ct Princess Cut Peridot, 4.9 x 4.9 mm From China

1.12 ct Octagon Cut Color-Change Diaspore, 8.1 x 4.3 mm From Turkey

1.67 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.3 x 4.3 mm

2.18 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 11 x 8.1 mm

1.21 ct Oval Strawberry Quartz, 7 x 5.1 mm From Russia

2.57 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 4.1 mm

1.11 ct Blue Kyanite, 7.1 x 5.2 mm Oval Cut From Nepal

8.14 ct Oval Actinolite Cat's Eye, 15.5 x 11.9 mm From the United States

0.76 ct Loose Yellow Sapphire, 5.2 mm Round Cut From Tanzania

10.25 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 14.2 x 12.1 mm

28.34 ct Oval Jasper, 29.1 x 16.2 mm From Indonesia

0.8 ct Oval Cut Peridot, 7 x 5.1 mm From China

2.77 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 5.1 x 3.2 mm

5.93 ct Yellow Agate, 12.6 x 11.3 mm Oval Cut From India

1.79 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gem, 8 mm

10.12 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 18.1 x 13.1 mm

8.97 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 14.1 x 9.9 mm

5.01 ct Pink Morganite, 13.6 x 9.8 mm Oval Cut From Afghanistan

1.15 ct Cushion Cut Color-Change Diaspore, 7.7 x 5.3 mm From Turkey

3.34 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 11 x 7.7 mm

10.05 ct Marquise Slice Ruby in Fuchsite, 21.2 x 9.9 mm From Ethiopia

32.72 ct Oval Checkerboard Labradorite, 25.4 x 18.2 mm From Madagascar

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