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

I was looking for ammolite for my husband. Other websites are not always clear about whether they have genuine ammolite or simulated ammolite. I have purchased from GemSelect before and trust that the stones are genuine. Finding the stones I want is easy, and I love all of the search filter options!

Posted By Ana in September, 2023

Source: Bizrate

Overall Rating -> 10

The website is very easy to use. The search function, filter and sort functions are very helpful.

Posted By Sboro in August, 2023

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Overall Rating -> 10

Very good customer service. I had an issue on my end with shipping and I received a response the next day!

Posted By Orphanboy in December, 2023

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Overall Rating -> 8

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

Posted By MI photo in May, 2023

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Overall Rating -> 10

I have used GemSelect for several years and plan to shop more in the further. This is a good source of information on gemstones. I love looking at and learning about them. Lot more than I ever knew existed.

Posted By Bikerwalrus in October, 2023

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Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

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Overall Rating -> 10

Always have good experience

Posted By Ginnie in September, 2023

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Overall Rating -> 10

I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you

Posted By Sue in April, 2023

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Overall Rating -> 10

After having looked at other purchasing sites, this is my first choice.

Posted By MJC in January, 2024

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Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

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Overall Rating -> 10

This is only the second time I have ordered from GemSelect. I am a prolific gemstone collector and I wish I had found this site sooner!

Posted By Beachcomber in September, 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

Trustworthy site. I've had several good experiences with company. Products always have met my expectations. Thank you.

Posted By Ray in February, 2024

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Overall Rating -> 10

Very detailed and great pictures

Posted By Alexandrite in November, 2023

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Gemstones A-Z

Buy Marquise Shape 10x5 mm Gems

0.38 ct Oval Cut Kornerupine, 5 x 4 mm From Sri Lanka

6.6 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.9 x 8.8 mm

2.35 ct Oval Black Opal, 9.1 x 7.1 mm From Ethiopia

23.69 ct Fancy Jasper, 24.1 x 15.2 mm From Indonesia

76.12 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 41.4 x 34.5 mm

2.45 ct Black Star Sapphire, 8.4 x 6.4 mm Oval Cut From Thailand

1.5 carat Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 9.1 mm

2.62 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm

4.39 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.1 x 4.2 mm

6.46 ct Fancy Fire Agate, 16 x 9.6 mm From Mexico

0.75 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Gem, 8.1 x 4.9 mm

34.63 ct Fancy Jasper, 27.6 x 23.6 mm From Indonesia

2.96 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 12.3 x 9.2 mm

9.31 ct Oval Cut Mystic Quartz, 12.1 x 10.1 mm From Brazil

1.3 ct Round Spectrolite, 7 mm From Finland

1.48 ct Yellow Beryl, 7.1 mm Round Cut From Brazil

10.21 ct Carved Rose Tiger's Eye, 16 x 14.9 mm From Thailand

7.29 ct Pink Kunzite, 13.8 x 8.3 mm Oval Cut From Afghanistan

9.15 ct Yellow Andesine Labradorite, 14.4 x 11.4 mm Oval Cut From Congo

13.91 ct Oval Coral, 23.3 x 17.9 mm From Indonesia

0.1 ct Black Diamond, 2.1 mm Diamond Cut From India

3.47 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 3.9 x 3.9 mm

9.01 ct Cushion Tiger's Eye, 14 x 11.9 mm From Thailand

21.32 ct Oval Boulder Opal, 27.3 x 13.1 mm From Australia

1.57 ct Loose Pink Tourmaline, 7.1 mm Round Cabochon From Mozambique

22.2 ct Yellow Star Sapphire, 17.3 x 14.5 mm Oval Cut From Madagascar

0.67 ct Loose Pink Sapphire, 4.9 x 3.9 mm Oval Cut From Madagascar

7.45 ct Round Cut Smoky Quartz, 13.9 mm From Brazil

2.03 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 7.2 x 7.2 mm

53.62 ct Oval Jasper, 33.4 x 23.7 mm From Indonesia

1.71 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 14.2 x 3.9 mm

1.34 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gems, 8.1 x 6.1 mm

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