Buy 10 mm Round Calibrated 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 10 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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The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

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Gemstones A-Z

Buy Round Shape 10 mm Gems

4.4 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12.1 x 6.1 mm

152.35 ct Yellow Quartz, 38 x 31.5 mm Oval Portuguese Cut From Brazil

1.34 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gem, 10.3 x 5.1 mm

16.77 carat Pear Shape Ammolite, loose Certified Ammolite from Canada, Natural Gem, 20.6 x 18.8 mm

24.77 ct Oval Jasper, 29.8 x 20.5 mm From Indonesia

1.99 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 8.1 x 6.1 mm

1.92 ct Oval Spectrolite, 10.1 x 8.1 mm From Finland

4.42 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13.8 x 10 mm

8.32 carat Pear Quartz With Marcasite, loose Certified Quartz With Marcasite from Brazil, Natural Untreated Gem, 17.9 x 12.1 mm

1.28 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 10.1 x 5.1 mm

40.24 ct Oval Rose Cut Lapis Lazuli, 41.4 x 19 mm From Afghanistan

0.19 ct White Diamond, 2.9 mm Diamond Cut From Brazil

2.18 carat Blue Sapphire, Briolette with Hole loose Sapphire from Madagascar, Natural Gems, 4.6 mm

0.28 ct Blue Kyanite, 3.8 mm Round Cut From Nepal

3.83 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4.1 mm

0.66 ct Loose Purple Sapphire, 6.1 x 4.1 mm Octagon Cut From Tanzania

1.45 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7 x 5.1 mm

1.06 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5.1 mm

30.9 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 22.1 x 17.4 mm

9.89 carat Pear Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 17.3 x 11.2 mm

12.58 ct Oval Cut Pietersite, 19 x 12.2 mm From Namibia

17.58 carat Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 20 x 15 mm

2.25 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.7 x 7.3 mm

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

10.34 ct Asscher Cut Smoky Quartz, 10.4 x 10.3 mm From Brazil

12.1 carat Pink Topaz, Round loose Topaz from Brazil, Natural Gems, 11.1 mm

0.88 ct Black Diamond, 5.6 mm Diamond Cut From India

4.74 carat Sky Blue Topaz, Round loose Topaz from Brazil, Natural Gems, 8.2 mm

2.28 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.9 x 3.9 mm

2.96 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 12.3 x 9.2 mm

12.65 ct Yellow Quartz, 23.6 x 16.9 mm Carved From Brazil

2.25 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

Gemstone Information

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