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.

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Great selection of various gems, easy to navigate site

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I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

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Overall Rating -> 10

This is only the second time I have ordered from GemSelect. I am a prolific gemstone collector and I wish I had found this site sooner!

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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.

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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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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

8.14 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 15.8 x 8 mm

9.58 ct Baguette Malachite, 10 x 8.2 mm From Congo

0.75 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 7.5 x 5.2 mm

2.98 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.9 x 5.9 mm

1.09 ct Oval Cut Kornerupine, 7.8 x 5.9 mm From Sri Lanka

0.89 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Madagascar, Natural Untreated Gems, 4.2 x 4.2 mm

12.91 ct Oval Serpentine, 20.1 x 14.9 mm From the United States

0.65 ct Loose Purple Sapphire, 5.9 x 4 mm Octagon Cut From Tanzania

1.41 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5.2 mm

4.86 carat Carved Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.4 mm

7.67 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 15 x 7.2 mm

1.05 carat Round Cabochon Emerald, loose Certified Emerald from Colombia, Natural Gem, 5.9 mm

1.73 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8 x 6.7 mm

18.86 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 16.9 x 13.2 mm

14.21 carat Carved Rose Mother of Pearl, loose Certified Mother of Pearl from China, Natural Gem, 26 x 17.2 mm

7.71 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 15.7 x 11.4 mm

6.24 ct Oval Opal Doublet, 8.2 x 6 mm From Australia

0.79 ct Oval Sillimanite Cat's Eye, 5.3 x 5 mm From Madagascar

1.18 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 8.1 x 6.3 mm

1.06 carat Pear Shape Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 6.9 x 6.1 mm

3.66 carat Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gems, 8.2 x 6.1 mm

7.18 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15.8 x 11.9 mm

7.83 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 10.1 mm

41.14 ct Pencil Cut Rainbow Moonstone, 40.2 x 12 mm From the United States

2.43 ct Oval Prehnite, 8.6 x 7.5 mm From South Africa

8.37 ct Yellow Quartz, 13.5 x 13.1 mm Carved From Brazil

7.26 ct White Moonstone, 9.2 mm Round Cut From India

24.97 ct Oval Rainbow Moonstone, 25.2 x 16.4 mm From the United States

5.99 ct Fancy Fire Agate, 12.3 x 10.8 mm From Mexico

5.92 carat Pear Larimar, loose Certified Larimar from the Dominican Republic, Natural Untreated Gem, 19.9 x 11.2 mm

3.24 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.1 x 10 mm

22.53 ct Cushion Jasper, 19.7 x 17.1 mm From Indonesia

Gemstone Information

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