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 Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

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I’ve enjoyed purchasing stones from this site. It’s convenient and fairly priced.

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I have received emails for about a year and today is the condition that had me decide on the purchase

Posted By Tim in April, 2024

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Overall Rating -> 10

I have used this site for sseveral years now. All has been great. I started collection gems from GemSelect for years and wanted to collect at least one of most stones. I loved Safers because the mols is a 9 + and they come in every color. This is the best place to buy gems for the assortment and price. Great place to learn about gems too. Sometimes the shipping is a little on the long side. But I would give them a 9.9 out of 10 !!

Posted By Steve in July, 2023

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Overall Rating -> 10

My only complaint is that there are so many beautiful and affordable stones that I get distracted from what I planned to order.

Posted By Phoenix in March, 2024

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

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Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

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Perfect size I was looking for and great price

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Awesome

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Gemstones A-Z

Buy Marquise Shape 10x5 mm Gems

5.01 ct Round Rutile Quartz, 11.2 mm From India

1.69 ct Yellow Sphene, 6.8 mm Round Cut From Sri Lanka

15.27 ct Oval Rose Quartz, 16.8 x 13.7 mm From South Africa

1.5 ct Blue Green Grandidierite, 8.3 x 6.2 mm Oval Cut From Madagascar

2.49 ct Orange Sunstone, 9.6 mm Round Cut From India

0.94 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 5.6 mm

4.36 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12 x 10 mm

33.27 ct Oval Jasper, 27.9 x 20.3 mm From Mexico

4.9 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 10 x 5 mm

1.98 ct Loose Oval Cut Black Opal, 11.5 x 8.1 mm From Ethiopia

17.01 carat Pear Shape Onyx, loose Certified Onyx from Sri Lanka, Natural Gem, 21.8 x 17.8 mm

3.32 ct Round Labradorite, 7 mm From Madagascar

5.1 ct Asscher Cut Smoky Quartz, 10.3 x 10.3 mm From Brazil

11.51 ct Carved Smoky Quartz, 14.7 x 14.5 mm From Brazil

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

20.36 ct Marquise Cut Rose Quartz, 28.4 x 15.2 mm From South Africa

2.75 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.2 x 4.1 mm

1.96 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 11.6 x 7.7 mm

0.04 ct Black Diamond, 1.9 mm Diamond Cut From India

0.59 carat Violet Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6.5 x 4.3 mm

3.37 carat Pink Topaz, Round loose Topaz from Brazil, Natural Gem, 9 mm

0.93 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.3 x 3.8 mm

13.09 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 16.8 x 13.4 mm

0.46 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.6 x 3.7 mm

1.97 ct Oval Cut Golden Beryl, 8.1 x 6.1 mm From Madagascar

40.98 ct Cushion Charoite, 30.8 x 23.7 mm From Russia

0.7 ct Loose Orange Sapphire, 6.2 x 4.6 mm Oval Cut From Madagascar

14.76 carat Pear Chalcedony, loose Certified Chalcedony from Brazil, Natural Untreated Gem, 23.9 x 15.8 mm

12.43 ct Carved Prehnite, 18.5 x 12.1 mm From South Africa

0.51 ct Purple Spinel, 4.7 mm Round Cut From Tanzania

5.38 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14 x 9.8 mm

5.87 ct Purple Kunzite, 15.9 x 7.3 mm Octagon Cut From Afghanistan

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