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

2.56 carat Sky Blue Topaz, Trillion loose Topaz from Brazil, Natural Gems, 7.1 x 7.1 mm

5.6 ct Oval Malachite, 12.1 x 10 mm From Congo

5.86 carat Pear Seraphinite, loose Certified Seraphinite from Russia, Natural Untreated Gem, 13.9 x 9.9 mm

6.16 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12 mm

7.86 ct Round Cut Smoky Quartz, 13.9 mm From Brazil

0.88 ct Loose Pink Sapphire, 5 x 4.1 mm Oval Cut From Madagascar

26.38 ct Baguette Rose Cut Onyx, 23.1 x 18 mm From Sri Lanka

2.3 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 9.9 x 7.9 mm

1.31 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.1 x 5.1 mm

10.07 carat Round Cabochon Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 10.9 mm

1.37 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.2 x 4.1 mm

1.86 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7 x 6.9 mm

18.01 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gems, 20.4 x 13.7 mm

0.25 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.7 mm

2.05 ct Round Cut Peridot, 4.8 mm From China

10.7 ct Marquise Concave Cut Smoky Quartz, 19.9 x 13.4 mm From Brazil

4.92 ct Black Star Sapphire, 11 x 8.9 mm Oval Cut From Thailand

6.91 ct Yellow Quartz, 13.4 x 13.3 mm Carved From Brazil

6.08 ct Round Rutile Quartz, 12.1 mm From India

0.94 carat Round Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 7.1 mm

8.94 ct Marquise Rutile Quartz, 20.1 x 10.1 mm From India

23.67 ct Oval Jasper, 29.6 x 20.8 mm From Indonesia

6.57 ct Oval Cut Strawberry Quartz, 11.1 x 9.9 mm From Russia

3.65 ct Oval Spectrolite, 9.9 x 8.2 mm From Finland

3.38 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10.1 x 8.1 mm

1.61 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.5 x 6.8 mm

0.41 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 4.1 x 4 mm

13.76 ct Oval Rainbow Moonstone, 17.5 x 12.3 mm From the United States

4.33 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14 x 9.9 mm

0.72 ct Loose Purple Sapphire, 6 x 4.9 mm Oval Cut From Tanzania

0.45 carat Green Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.1 x 4.1 mm

17.18 ct Druzy Variscite, 26.4 x 21.7 mm From Argentina

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