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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I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

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Gemstones A-Z

Buy Marquise Shape 10x5 mm Gems

8.72 ct Cushion Tiger's Eye, 14.1 x 11.9 mm From Thailand

1.24 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.1 x 5.2 mm

26.65 ct Yellow Quartz, 19.1 x 19 mm Cushion Checkerboard From Brazil

1.72 ct Yellow Beryl, 8.1 mm Round Cut From Madagascar

4.23 ct Oval Cat's Eye Opal, 13.5 x 8 mm From Madagascar

2.43 ct Cushion Cut Peridot, 9.1 x 6.6 mm From Myanmar

1.62 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 7 x 5.1 mm

1.59 ct Oval Carnelian, 9.1 x 7.1 mm From India

1.35 ct Purple Spinel, 10.6 x 5.4 mm Marquise Cut From Tanzania

11.58 ct Oval Pietersite, 21.1 x 11.9 mm From Namibia

1.22 carat Green Tourmaline, Baguette Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7.7 x 5 mm

10.12 ct Baguette Tiger's Eye, 16 x 11.9 mm From Thailand

5.45 ct Multicolor Mystic Quartz, 9.2 x 9.2 mm Trillion Concave Cut From Brazil

18.01 ct Blue Green Turquoise, 16.2 x 15.8 mm Oval Cut From the United States

3.11 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.2 x 4.2 mm

2.18 ct Oval Cut Andalusite, 5.2 x 4.2 mm From Brazil

3.84 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gems, 8.2 mm

0.85 ct Loose Yellow Sapphire, 4.7 x 4.6 mm Heart Cut From Tanzania

1.67 carat Orange Zircon, Emerald Cut loose Zircon from Tanzania, Natural Untreated Gem, 7.2 x 5.2 mm

19.87 ct Cushion Jasper, 24 x 20.4 mm From Indonesia

4.02 ct White Moonstone, 11.2 x 9.2 mm Oval Cut From India

9.75 ct Blue Green Grandidierite, 14.6 x 10.7 mm Oval Cut From Madagascar

8.85 ct Yellow Quartz, 15.9 x 13.7 mm Star Cut From Brazil

14.85 ct Marquise Larimar, 30.8 x 15.9 mm From the Dominican Republic

1.72 carat White Topaz, Marquise Cut loose Topaz from Brazil, Natural Untreated Gem, 11.7 x 5 mm

2.2 carat Yellow Citrine, Carved Flower loose Citrine from Brazil, Natural Untreated Gem, 8.6 x 8.6 mm

0.63 carat London Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 8.1 x 4 mm

3.54 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.1 x 9 mm

0.86 ct Loose Round Cut Lapis Lazuli, 6.1 mm From Afghanistan

1.16 ct Loose Yellow Sapphire, 5.7 mm Round Cut From Tanzania

41.15 ct Round Hematite, 21.6 mm From Brazil

5.03 ct Fancy Fire Agate, 11.5 x 9.6 mm From Mexico

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