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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Overall good, shipping prices just seem a little on the high side.

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Overall Rating -> 10

Excellent selection of products. Website easy to navigate and make purchases.

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Overall Rating -> 10

Easy to find products I want. I've ordered several times from gem select and never any problems. Will order again. Thank you.

Posted By Ray in January, 2024

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Overall Rating -> 10

Great experience! First time buyer

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Overall Rating -> 10

Very detailed and great pictures

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The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

Posted By Kasper in June, 2023

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Overall Rating -> 10

I FOUND WHAT I WANT IT

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Overall Rating -> 9

GemSelect has a fantastic assortment of Semi-precious stones. I have not found any other web site with the variety you have.

Posted By RobDill in August, 2023

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Overall Rating -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

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Overall Rating -> 10

My first order. I am anxious to see if what I ordered is what I receive.

Posted By KRJ in July, 2023

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Overall Rating -> 10

Was easy to search for many gems and mineral stones.Authenticity of natural stones is important, and I feel this site offers some assurance on this.

Posted By DanM in November, 2023

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Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 2023

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Overall Rating -> 10

first time here sooooooooooo we will seeeee!!!!! so far so good!!!!!!

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Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 8

I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.

Posted By Mark in March, 2024

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Gemstones A-Z

Buy Marquise Shape 10x5 mm Gems

15.73 ct Oval Larimar, 20 x 15.1 mm From the Dominican Republic

37.71 ct Oval Malachite, 30.5 x 20.3 mm From Congo

14.48 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 16.1 x 12.1 mm

12.07 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 16.2 x 12.2 mm

8.14 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 15.8 x 8 mm

2.9 ct Square Cut Rainbow Moonstone, 3.1 x 3 mm From India

30.1 ct Cushion Obsidian, 26.8 x 20.8 mm From Mexico

9.72 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 21.1 x 6.9 mm

1.27 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.5 x 5.6 mm

2.62 ct Loose Yellow Sapphire, 4.9 mm Round Cut From Tanzania

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

7.93 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 13.8 x 8.1 mm

0.46 ct Loose Orange Sapphire, 5.3 x 4.3 mm Oval Cut From Tanzania

0.52 carat Oval Color-Change Garnet, loose Certified Color-Change Garnet from Tanzania, Natural Untreated Gem, 5.8 x 4.1 mm

25.84 ct Baguette Hematite, 18.8 x 13.4 mm From Brazil

29.31 ct Oval Fossil Coral, 22.2 x 13.8 mm From Indonesia

31.12 carat Bi-color Ametrine, Cushion loose Ametrine from Brazil, Natural Untreated Gem, 18.1 x 17.8 mm

1.45 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gems, 6.2 x 6 mm

0.74 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 5.4 mm

22.03 ct Pencil Cut Tiger's Eye, 35.2 x 8.9 mm From Thailand

0.48 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6 x 3.9 mm

2.03 carat Princess-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 7.9 x 7.9 mm

5.48 ct Oval Tiger's Eye, 14.1 x 10 mm From Thailand

0.57 ct Oval Cut Color-Change Diaspore, 6.4 x 4.2 mm From Brazil

0.62 carat London Blue Topaz, Square loose Topaz from Brazil, Natural Gem, 4.7 x 4.6 mm

55.68 carat Blue Aquamarine, Pear Shape loose Aquamarine from Madagascar, Natural Untreated Gem, 36.2 x 18.7 mm

2.17 ct Oval Checkerboard Rainbow Moonstone, 7.1 x 6 mm From India

3.4 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gems, 8.1 x 6.1 mm

1.32 ct Yellow Beryl, 8.9 x 6.7 mm Oval Cut From Madagascar

4.68 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 10.2 x 5.1 mm

2.55 ct Cushion Cut Peridot, 8.5 x 6.6 mm From Myanmar

1.93 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 8 x 6 mm

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