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

5.1 ct Round Agate, 10.5 mm From Indonesia

4.75 carat Sky Blue Topaz, Emerald Cut loose Topaz from Brazil, Natural Gems, 9 x 7.1 mm

10.02 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 14 x 10 mm

0.75 ct Yellow Beryl, 6.9 x 6.8 mm Trillion Cut From Madagascar

11.53 ct Baguette Malachite, 11.6 x 10.7 mm From Congo

2.04 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10.2 x 5 mm

1.94 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13.9 x 6.4 mm

1.4 carat Orange Zircon, Pear Shape loose Zircon from Cambodia, Natural Untreated Gem, 8 x 5.8 mm

1.05 carat Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 10 x 5.2 mm

1.32 carat Green Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.2 x 6.2 mm

23.64 carat Pear Howlite, loose Certified Howlite from the United States, Natural Untreated Gem, 27.4 x 19 mm

2.33 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.1 x 8.9 mm

2.78 ct Blue Star Sapphire, 6.1 mm Round Cut From Thailand

1.27 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 19.4 x 2.6 mm

67.54 ct Baguette Tiger's Eye Matrix, 30.9 x 23.7 mm From Mexico

17.51 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 19.4 x 14.6 mm

10.19 ct Loose Oval Malachite, 13.8 x 10.2 mm From Congo

4.67 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 11 x 9 mm

15.85 ct Green Aventurine, 24.7 x 14.1 mm Oval Cut From Brazil

1.48 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 10.4 x 7.3 mm

17.73 ct Cushion Spectrolite, 26.9 x 12 mm From Finland

5.27 carat Yellow Citrine, Emerald Cut loose Citrine from Bolivia, Natural Untreated Gem, 11.5 x 10 mm

4.69 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 9.8 x 4.9 mm

0.75 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.1 x 4.1 mm

5.13 ct Octagon Cut Rose Quartz, 10.7 x 10.3 mm From South Africa

0.45 ct Loose Orange Sapphire, 6 x 3.9 mm Oval Cut From Tanzania

7.86 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 10.1 x 7.7 mm

1.3 ct Yellow Sphene, 7.1 x 5.5 mm Oval Cut From Sri Lanka

1.82 ct Blue Green Grandidierite, 8.6 x 6.5 mm Oval Cut From Madagascar

2.49 ct Orange Moonstone, 7.1 x 6.8 mm Cushion Cut From India

5.19 ct Fancy Fire Agate, 12.7 x 10 mm From Mexico

5.19 ct Yellow Quartz, 13.2 x 10.2 mm Oval Diamond Cut From Brazil

Gemstone Information

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