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.

Read All

Gemstone Information

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10

I purchase all of my stones from GemSelect! They're the best I've found for both selection and value.

Posted By Terry in June, 2023

Source: Bizrate

Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

Source: Bizrate

Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

Source: Bizrate

Overall Rating -> 9

making my own jewelry for my birth stone

Posted By LoveGeo in July, 2023

Source: Bizrate

Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

Posted By Iggywiggly in January, 2024

Source: Bizrate

Overall Rating -> 10

Everything fine.

Posted By Hilario in December, 2023

Source: Bizrate

Overall Rating -> 9

I have been buy from you for years

Posted By JohnA in May, 2023

Source: Bizrate

Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

Source: Bizrate

Overall Rating -> 10

Extremely easy to use, and I am fully satisfied with the purchase process.

Posted By Fl_Beachcomber in October, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Everything was fine.

Posted By Matt in March, 2024

Source: Bizrate

Overall Rating -> 9

Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.

Posted By Bob in November, 2023

Source: Bizrate

Overall Rating -> 10

Always an easy experience using Gem select.

Posted By Jeff in November, 2023

Source: Bizrate

Overall Rating -> 10

Very detailed and great pictures

Posted By Alexandrite in November, 2023

Source: Bizrate

Overall Rating -> 10

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

Source: Bizrate

Gemstones A-Z

Buy Marquise Shape 10x5 mm Gems

1.66 ct Blue Kyanite, 8.2 x 6.2 mm Oval Cut From Nepal

43.76 carat Pear Dendritic Agate, loose Certified Dendritic Agate from India, Natural Untreated Gem, 38.9 x 21.6 mm

4.24 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gems, 5.9 mm

6.74 ct Oval Star Ruby, 9.6 x 8.7 mm From Madagascar

0.65 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7.7 x 3.8 mm

1.98 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 6.8 mm

1.02 ct Yellow Morganite, 7.9 x 5.9 mm Oval Cut From Afghanistan

3.67 ct Yellow Quartz, 9.1 x 9 mm Carved From Brazil

1.53 carat Pear Shape Rainbow Moonstone, loose Certified Rainbow Moonstone from India, Natural Untreated Gems, 5.1 x 5.1 mm

1.99 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 11.9 x 8.3 mm

1.29 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gems, 5 mm

3.92 ct Oval Rutile Quartz, 12 x 7.9 mm From India

12.82 carat Square Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.8 x 6.7 mm

10.27 ct Baguette Tiger's Eye, 16.2 x 12.5 mm From Thailand

12.59 carat Uvarovite Garnet Drusy, loose Certified Uvarovite Garnet Drusy from Russia, Natural Untreated Gem, 16.6 x 14.9 mm

5.13 ct Round Cut Smoky Quartz, 11.7 mm From Brazil

2.43 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6 x 4 mm

1.6 carat Opal, loose Certified Opal from Ethiopia, Natural Gem, 10.5 x 6 mm

1.1 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 7.4 x 5.5 mm

3.16 carat Pear Shape Rainbow Moonstone, loose Certified Rainbow Moonstone from India, Natural Untreated Gems, 4.9 x 4.9 mm

3.69 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.9 x 7.9 mm

1.82 carat Marquise Cut Ruby, loose Certified Ruby from Myanmar, Natural Gem, 10.5 x 5.3 mm

3.7 carat Blue Sapphire, Princess-Cut loose Sapphire from Madagascar, Natural Gems, 2.9 x 2.9 mm

2.17 carat Sky Blue Topaz, Round loose Topaz from Brazil, Natural Gems, 6.1 mm

0.7 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 7.8 x 5.1 mm

13.67 carat Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16 x 16 mm

6.08 ct Oval Tiger's Eye, 10.1 x 8 mm From Thailand

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

3.24 ct Loose Princess Cut Sapphire, 2.8 x 2.8 mm From Tanzania

2.72 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9.1 x 6.8 mm

17.43 ct Oval Coral, 29.7 x 19.8 mm From Indonesia

6.66 ct Oval Agate, 11.4 x 11.1 mm From Indonesia

Gemstone Information

Gemstone SHOP

POLICIES

WHO ARE WE?

Gemstone EDUCATION

WE ARE LOCATED AT