Calibrated 8 mm Round Shape Loose Natural Gemstones from GemSelect

Some people by 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 8 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 slightly higher even. 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 8 mm Gems

8.15 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6 x 4.1 mm

7.44 carat Sky Blue Topaz, Carved Flower loose Topaz from Brazil, Natural Gem, 15.1 x 10.9 mm

1.11 ct Loose Orange Sapphire, 4.8 mm Round Cut From Tanzania

13.59 ct Round Agate, 13.4 mm From Indonesia

0.75 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 5.2 x 5.2 mm

14.48 carat Pear Shape Labradorite, loose Certified Labradorite from Madagascar, Natural Untreated Gems, 18.3 x 13.3 mm

4.14 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 4 x 3.9 mm

1.1 carat Orange Hessonite Garnet, Pear Shape loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.9 x 5.6 mm

5.41 ct Loose Pear Labradorite, 10.1 x 7 mm From Madagascar

1.33 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.9 x 5.1 mm

1.75 carat Orange Zircon, Oval loose Zircon from Tanzania, Natural Untreated Gem, 7.8 x 6 mm

1.49 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.6 x 6.2 mm

0.81 ct Loose White Sapphire, 4.5 mm Diamond Cut From Madagascar

2.43 ct White Moonstone, 10.5 x 7.6 mm Oval Cut From India

11.61 ct Round Cut Color-Change Fluorite, 14.1 mm From Brazil

3.95 ct Black Star Sapphire, 9.2 x 7.8 mm Oval Cut From Thailand

0.6 ct Purple Spinel, 4.9 x 4.2 mm Cushion Cut From Tanzania

0.41 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 6 x 4.1 mm

0.51 carat Cushion Checkerboard Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 6.1 x 4.1 mm

2.97 ct Yellow Andesine Labradorite, 10.3 x 8.3 mm Oval Cut From Congo

1.52 ct Green Sphene, 6.8 x 6.5 mm Oval Cut From Sri Lanka

6.5 ct Yellow Quartz, 8.7 x 8.6 mm Carved From Brazil

8 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.1 mm

0.81 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.5 x 4.5 mm

6.9 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 14.4 x 7.2 mm

4.33 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 4.9 x 3.2 mm

3.5 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.8 x 7 mm

1.09 ct Oval Cut Peridot, 7.7 x 6 mm From China

28.85 ct Oval Serpentine, 24.2 x 17 mm From the United States

5.2 ct Octagon Cut Smoky Quartz, 12.9 x 9.9 mm From Brazil

3.12 ct Asscher Cut Rose Quartz, 9.2 x 9.2 mm From South Africa

2.89 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gems, 6.1 x 5 mm

Gemstone Information

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