Marquise Shape 10 x 5 mm calibrated natural loose gems 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 marquise shaped facet cut gems, gemstone carvings and cabochons available in 10 mm x 5 mm sizes. For the largest selection of colored gemstones, Shop GemSelect Online.

As a general guideline, when it comes to calibrated gems, they are not usually expected to be cut to exact measurements and specifications. But rather, they're cut with slight variance in size, though the close approximatation in size is not clearly defined, there are general guidelines for what is considered acceptable. Obviously larger and heavy carat weight stones allow more room in size for variance, while smaller stones may leave little to none. This means a large 30mm calibrated gemstone, could actually be closer to 31 millimeters. For this reason, we recommend to always view the exact size in addition to the calibrated size details. The exact size will inform you of the variance you can expect. Some setting styles are more flexible with variance, such as prong settings, while other styles of mountings may need almost an exact size to the fraction of millimeter.

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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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 Marquise Shape 10x5 mm Gems

20.43 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 16.5 x 14 mm

2.21 carat Opal, loose Certified Opal from Ethiopia, Natural Gem, 8.2 x 7.9 mm

18.89 carat Pear Howlite, loose Certified Howlite from the United States, Natural Untreated Gem, 29.9 x 18.2 mm

1.13 ct Yellow Sphene, 6.6 x 5.5 mm Oval Cut From Sri Lanka

5.55 ct Blue Star Sapphire, 7 x 5.2 mm Oval Cut From Thailand

34 ct Multicolor Jasper, 32.8 x 22.1 mm Oval Cut From Indonesia

1.43 ct Loose Yellow Sapphire, 3 x 3 mm Princess Cut From Tanzania

0.84 ct Loose Round Pietersite, 6.1 mm From Namibia

1.09 ct Blue Kyanite, 6.1 mm Round Cut From Nepal

7.41 ct Oval Star Moonstone, 14.2 x 10 mm From India

4.02 ct Orange Moonstone, 8.2 x 8 mm Trillion Cut From India

3.06 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 8.9 mm

3.23 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 4.9 mm

3.76 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7 x 5 mm

6.36 ct Round Petal Cut Rose Quartz, 11.4 mm From South Africa

12.53 ct Odd Shaped Druzy Variscite, 23.2 x 16.9 mm From China

0.89 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 9.5 x 4.8 mm

6.62 carat Black Tourmaline, Pear Shape loose Tourmaline from Mozambique, Natural Untreated Gem, 13.5 x 10.5 mm

5.02 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 8 x 5.1 mm

0.58 ct Blue Kyanite, 6.2 x 4 mm Oval Cut From Nepal

4.97 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9.9 x 7.9 mm

1.08 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 14 x 3.4 mm

12.84 carat Bi-color Ametrine, Oval loose Ametrine from Brazil, Natural Untreated Gem, 19 x 12.6 mm

7.1 ct Pink Morganite, 14.7 x 11.1 mm Oval Cut From Afghanistan

6.05 ct Round Rutile Quartz, 11.1 mm From India

4.52 ct Blue Star Sapphire, 6.9 x 5.1 mm Oval Cut From Thailand

0.82 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 8.2 x 6.1 mm

3.08 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gems, 5.9 x 4.9 mm

4.97 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.6 x 9.5 mm

3.4 ct Round Prehnite, 6.7 mm From South Africa

2.57 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.1 x 6.2 mm

4.97 ct Blue Green Grandidierite, 11.7 x 10.4 mm Oval Cut From Madagascar

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