Buy 12 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 12 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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I am of the opinion that the company gem select cares about the product beautiful gems it sells and the cost of the gem I purchased was small i was treated as if it cost a lot of money and product was described in detail and i felt good about the little stones i had ordered.

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Gemstones A-Z

Buy Round Shape 12 mm Gems

0.3 ct Baguette Cut Iolite, 5 x 2.9 mm From Madagascar

2.74 ct Pink Morganite, 13.8 x 6.9 mm Marquise Cut From Afghanistan

42.08 ct White Quartz, 30.2 x 25.1 mm Carved From Brazil

4.52 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 10 x 5 mm

1.04 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 5.1 x 5.1 mm

21.06 ct Oval Nuummite, 19.9 x 18.5 mm From India

0.6 ct Loose Yellow Sapphire, 4.1 x 4.1 mm Square Cut From Tanzania

0.39 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gem, 4.4 mm

1.34 ct Green Sphene, 6.8 x 5.9 mm Oval Cut From Sri Lanka

1.09 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 6.1 x 4 mm

0.42 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar

0.65 ct Oval Cut Color-Change Diaspore, 5.5 x 4.5 mm From Turkey

3.39 ct Oval Prehnite, 9.6 x 7.6 mm From South Africa

4.88 ct Yellow Sillimanite, 9 x 7.2 mm Oval Cut From Sri Lanka

0.7 ct Blue Kyanite, 5.1 mm Round Cut From Nepal

5.52 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 15.1 x 7.1 mm

4.38 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

4.23 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10 x 8.1 mm

28.75 ct Oval Obsidian, 33.4 x 20.9 mm From Mexico

1.64 ct Yellow Beryl, 7.9 mm Round Cut From Madagascar

2.85 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 8.5 x 6.2 mm

4.61 carat Blue Green Fluorite, Pear Shape loose Fluorite from India, Natural Untreated Gem, 11.6 x 8.6 mm

27.51 carat Black Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 38.1 x 8.9 mm

1.05 ct Loose Oval Cut Black Opal, 9.6 x 6.3 mm From Ethiopia

8.27 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 13.9 x 8.1 mm

2.83 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gem, 8.9 x 8.9 mm

1.37 ct Yellow Sillimanite, 7.7 x 5.8 mm Oval Cut From Sri Lanka

0.48 ct Loose Pink Sapphire, 5.7 x 4.1 mm Oval Cut From Madagascar

0.81 ct Oval Cut Peridot, 7.1 x 5 mm From China

2.84 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 8.8 x 8.8 mm

28.98 ct Oval Coral, 23.6 x 14.2 mm From Indonesia

12.19 ct Orange Sphalerite, 14.9 x 11.6 mm Oval Cut From Congo

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