Marquise Shape 8 x 4 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 8 mm x 4 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 FOUND WHAT I WANT IT

Posted By GABY in March, 2024

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Overall Rating -> 10

The website is user friendly, has excellent selection. I've always found what I was looking for with Gem Select. When others don't have it they do. And most important, they have a way for you to pay without using PayPal. I cannot use PayPal they closed my account because of no cell phone.

Posted By NJD in September, 2023

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Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

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Overall Rating -> 10

Great selection, I love your site! Great product visibility, information, etc.

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Overall Rating -> 9

It was simple and clear to understand.

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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 !!

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Overall Rating -> 9

Good interaction with site

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Overall Rating -> 10

I find the website user friendly.

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Overall Rating -> 10

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

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Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 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.

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Overall Rating -> 10

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

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Overall Rating -> 10

Overall, the whole process was just great.

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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 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

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Gemstones A-Z

Buy Marquise Shape 8x4 mm Gems

6.69 carat Yellow Citrine, Cushion Buff Top loose Citrine from Brazil, Natural Untreated Gem, 12.2 x 10.2 mm

0.14 ct Yellow Diamond, 3.3 mm Diamond Cut From India

0.87 carat Orange Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 8.1 x 4.1 mm

5.05 ct Blue Green Grandidierite, 13 x 9 mm Oval Cut From Madagascar

0.39 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 5.9 x 3.9 mm

0.64 ct Oval Cut Color-Change Diaspore, 6 x 4.2 mm From Brazil

0.67 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 8.5 x 5 mm

4.37 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.8 x 10 mm

1.13 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.8 x 5.9 mm

0.06 ct Blue Diamond, 2.4 mm Diamond Cut From India

14.7 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 21.3 x 18.4 mm

22.45 ct Oval Tiger's Eye, 22.1 x 16 mm From Thailand

1.32 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.6 x 3.1 mm

0.36 ct Loose Orange Sapphire, 4.9 x 2.5 mm Marquise Cut From Tanzania

3.19 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 13.7 x 9.5 mm

1.31 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.9 x 4.9 mm

9.38 ct Yellow Quartz, 16.2 x 14 mm Hexagon Cut From Brazil

13.83 carat Green Opal, Oval loose Opal from Brazil, Natural Untreated Gem, 18 x 13.8 mm

6.11 ct Oval Tiger's Eye, 10.3 x 8.2 mm From Thailand

4.02 ct Round Rutile Quartz, 10.3 mm From India

3.87 ct Oval Rutile Quartz, 12.3 x 8.4 mm From India

2.16 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.3 x 9.1 mm

0.72 carat Green Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.7 x 4.5 mm

3.64 ct Round Checkerboard Smoky Quartz, 7.9 mm From Brazil

3.21 ct Yellow Apatite, 9.1 x 8.9 mm Asscher Cut From Madagascar

12.78 carat Oval Cabochon Amethyst for Sale, loose Certified Amethyst from Brazil, Natural Untreated Gems, 14.2 x 10.1 mm

1.6 ct Blue Star Sapphire, 7 x 5.2 mm Oval Cut From Thailand

1.84 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.2 x 6.6 mm

3.97 carat Blue Sapphire, Briolette with Hole loose Sapphire from Sri Lanka, Natural Gems, 5.9 mm

0.67 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 5.9 x 4.8 mm

2.66 carat Blue Sapphire, Briolette with Hole loose Sapphire from Madagascar, Natural Gems, 4.1 mm

2.16 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.1 x 9.1 mm

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