Marquise Shape 6 x 3 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 6 mm x 3 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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LOVE YOU GUYS. YOU CARRY EVERY GEMSTON I WANT. THE PRICE IS GREAT,THE PRODUCT IS OUTSTANDING,AND THE SERVICE CANT BE BEET.

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

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

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Purchased for my granddaughter she was very pleased with it.

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all good

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

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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

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Overall Rating -> 9

I was in the market for birthstones for a lil gift project im doing. I'm no expert in gems or what not but the quality as far as i can tell seems to be spot on.

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Overall Rating -> 10

it was good

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The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

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I find the website user friendly.

Posted By Becky in August, 2023

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Overall Rating -> 10

the searching format was easy to find what i needed. It helped to be able to sort Lowest price to Highest because i wasnt looking to spend too much but i did want an actual stone and not imitation.

Posted By PixelComposer in January, 2024

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Gemstones A-Z

Buy Marquise Shape 6x3 mm Gems

1.51 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.9 x 5.9 mm

17.36 ct Carved Ruby-Zoisite, 17.7 x 15.8 mm From Tanzania

1.72 ct Yellow Beryl, 9 x 8.8 mm Trillion Cut From Brazil

1.96 ct Blue Green Apatite, 4.9 mm Round Cut From Madagascar

5.18 ct Blue Star Sapphire, 6.9 x 5.1 mm Oval Cut From Thailand

1.48 ct Blue Apatite, 4.9 x 4 mm Oval Cut From Madagascar

0.93 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 13.1 x 3 mm

1.94 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 4.2 x 4.1 mm

34.44 ct Round Snowflake Obsidian, 28.4 mm From India

0.57 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6 x 4 mm

2.25 ct Orange Coral, 12.2 x 4.9 mm Oval Cut From Australia

0.14 ct Black Diamond, 3.1 mm Diamond Cut From India

0.58 ct Loose Pink Sapphire, 5 mm Round Cut From Madagascar

21.36 carat Bi-color Ametrine, Oval loose Ametrine from Brazil, Natural Untreated Gem, 20.3 x 15.3 mm

3.96 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7 x 5 mm

0.42 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.1 x 4 mm

2.26 carat Blue Green Fluorite, Pear Shape loose Fluorite from India, Natural Untreated Gem, 9.8 x 6.6 mm

4.45 carat Pink Morganite, Pear loose Morganite from Afghanistan, Natural Untreated Gem, 14.1 x 9.8 mm

2.61 ct Oval Concave Cut Smoky Quartz, 10 x 8 mm From Brazil

12.5 carat Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15 x 15 mm

4.5 carat Pink Kunzite, Pear Shape loose Kunzite from Afghanistan, Natural Untreated Gem, 12.5 x 7.6 mm

6.32 ct Yellow Quartz, 14.1 x 10.2 mm Flower Cut From Brazil

2.87 ct Oval Cut Fire Opal, 7.1 x 5.4 mm From Mexico

19.8 ct Fancy Moss Agate, 23.3 x 11.4 mm From India

1.95 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 7.1 mm

6.84 carat Bi-color Ametrine, Oval loose Ametrine from Brazil, Natural Untreated Gem, 15.8 x 10.2 mm

88.1 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 28.1 x 25.5 mm

7.9 ct Oval Star Moonstone, 14.2 x 10.1 mm From India

2.58 ct Loose Orange Sapphire, 6.8 x 3.5 mm Marquise Cut From Tanzania

7.76 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 15 x 7.1 mm

0.58 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6.1 x 3.9 mm

0.91 carat Blue Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 4.5 mm

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