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

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

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Overall Rating -> 10

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

Posted By Tim in April, 2024

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Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

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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

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Overall Rating -> 10

Posted By ChiChi in January, 2024

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Overall Rating -> 10

I FOUND WHAT I WANT IT

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Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

The site is very easy to use and I will continue to shop here. The quality is superb

Posted By Genia in January, 2024

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Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

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Overall Rating -> 10

all good

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Overall Rating -> 10

Found what I was looking for

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Overall Rating -> 10

Very good customer service. I had an issue on my end with shipping and I received a response the next day!

Posted By Orphanboy in December, 2023

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Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

Posted By Jrplunk in April, 2024

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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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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

1.76 carat Yellow Citrine, Carved Flower loose Citrine from Brazil, Natural Untreated Gem, 7.5 x 7.4 mm

0.55 ct Loose Yellow Sapphire, 5.7 x 3.9 mm Oval Cut From Tanzania

2.24 ct Round Onyx, 5.5 mm From Sri Lanka

5.35 ct Fancy Fire Agate, 16 x 11.7 mm From Mexico

2.66 ct Round Cut Golden Beryl, 9.2 mm From Madagascar

20.8 ct Pink Coral, 21.7 x 15 mm Carved From Taiwan

1.17 ct Yellow Beryl, 8 x 6 mm Oval Cut From Madagascar

3.32 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12 x 5.9 mm

1.78 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 7.9 x 7.8 mm

0.47 carat Round Grossularite Garnet, loose Certified Grossularite Garnet from Tanzania, Natural Untreated Gem, 4.4 mm

0.75 carat Multicolor Opal, Oval loose Opal from Ethiopia, Natural Gem, 8 x 5.5 mm

1.15 ct Oval Chocolate Opal, 9.1 x 7.1 mm From Ethiopia

1.89 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.1 x 6 mm

1.21 ct Oval Cut Rainbow Moonstone, 8.2 x 6.1 mm From the United States

3000 ct Faceted Sphere Lapis Lazuli, 72.4 mm From Afghanistan

136.79 ct Cushion Jasper, 49.5 x 33.7 mm From Indonesia

3.45 ct Square Cut Rainbow Moonstone, 3.2 x 3.2 mm From India

29.97 ct Yellow Quartz, 20.3 x 17.9 mm Oval Cut From Brazil

0.04 ct Green Diamond, 2.1 mm Diamond Cut From India

8.29 ct Yellow Apatite, 11.8 x 11.6 mm Asscher Cut From Madagascar

1.23 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 9.5 x 6.6 mm

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

3.27 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 7.2 x 5.7 mm

1.24 ct Cushion Cut Color-Change Diaspore, 8.1 x 5.1 mm From Turkey

2.43 ct Yellow Apatite, 8.1 x 7.9 mm Asscher Cut From Madagascar

3.76 ct Green Agate, 10.1 x 8.5 mm Oval Cut From India

1.38 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

1.76 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7 x 5 mm

2.24 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from India, Natural Untreated Gem, 7 x 6.9 mm

26.74 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 31.4 x 18.4 mm

3.18 carat Trillion Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm

2.54 carat Sky Blue Topaz, Trillion loose Topaz from Brazil, Natural Gems, 7.2 x 7 mm

Gemstone Information

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