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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Gemstones A-Z

Buy Round Shape 6.5 mm Gems

20.36 ct Marquise Cut Rose Quartz, 28.4 x 15.2 mm From South Africa

0.9 carat Oval Peridot, loose Certified Peridot from China, Natural Untreated Gem, 7.2 x 5.2 mm

1.61 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 7.9 x 6.1 mm

1.12 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 9.4 x 6.8 mm

0.83 ct Blue Kyanite, 7.1 x 5.1 mm Oval Cut From Nepal

3.06 carat Red Zircon, Oval loose Zircon from Tanzania, Natural Untreated Gem, 9 x 7.1 mm

2.8 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gems, 6 x 5 mm

3.05 ct Green Agate, 8.9 x 8.2 mm Oval Cut From India

13 ct Oval Jasper, 19.9 x 15.1 mm From Indonesia

0.17 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.4 mm

3.92 carat Oval Strawberry Quartz, loose Certified from India, Natural Untreated Gem, 11.9 x 9.8 mm

1.71 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5.2 mm

0.99 ct Oval Sillimanite Cat's Eye, 6.6 x 5.3 mm From Madagascar

3.5 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12 x 10.1 mm

9.61 carat Swiss Blue Topaz, Cushion loose Topaz from Brazil, Natural Gem, 15.2 x 11.1 mm

2.33 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.8 x 7.3 mm

1.56 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 6.5 mm

1.21 ct Oval Sillimanite Cat's Eye, 7.5 x 5.2 mm From Madagascar

2.74 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 9.7 mm

1.37 ct Round Onyx, 7 mm From Sri Lanka

1.66 ct Orange Moonstone, 6.7 x 6.7 mm Cushion Cut From India

2.32 ct Yellow Sillimanite, 9.1 x 7.1 mm Oval Cut From Sri Lanka

2.58 carat Swiss Blue Topaz, Trillion-Cut loose Topaz from Brazil, Natural Gems, 7.1 x 7 mm

2.76 ct Green Apatite, 7.7 x 7.7 mm Asscher Cut From Madagascar

3.86 ct Green Apatite, 9.6 x 9.3 mm Asscher Cut From Madagascar

2.2 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.9 x 3.9 mm

0.25 ct Octagon Cut Kornerupine, 4 x 3.1 mm From Sri Lanka

3.52 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm

23.47 ct Octagon / Emerald Cut Hematite, 18.3 x 14.2 mm From Brazil

4.83 carat White Topaz, Round loose Topaz from Brazil, Natural Untreated Gem, 10.3 mm

2.76 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 8.1 x 6 mm

1.68 ct Loose Orange Moonstone, 9.8 x 5.4 mm Marquise Cut From India

Gemstone Information

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