Marquise Shape 6 x 3 mm calibrated natural loose gems from GemSelect

Marquise Shape 6x3 mm Gems

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.

Gemstone Information

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Overall Rating -> 10

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

Posted By Meow in June, 2023

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Overall Rating -> 10

very good

Posted By Dave in February, 2023

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Overall Rating -> 9

The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

Posted By Kasper in June, 2023

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Overall Rating -> 9

Good experience

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Overall Rating -> 8

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

Posted By Ralli in August, 2023

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Overall Rating -> 10

I loved my gem stones and i will order again and I would refer friends and family to purchase her in the future

Posted By Tina in October, 2022

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Overall Rating -> 10

It was great

Posted By Jp in January, 2023

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Overall Rating -> 7

I ordered tsavorite garnet. It wasn’t quite as vidid color as I was expecting. Still a nice stone

Posted By Babs in October, 2022

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Overall Rating -> 10

I am new to gem collecting and GemSelect made it very easy to get started

Posted By Taylor in February, 2023

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Overall Rating -> 10

I recommend to others

Posted By Kazzan in February, 2023

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Overall Rating -> 8

Great selection, good prices and beautiful, simple user interface.

Posted By Swaggermuffinz in October, 2022

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Overall Rating -> 8

I like to use GemSelect for finding calibrated sizes of gemstones. I purchased sapphires a few years ago and found the quality to be outstanding so I went ahead and purchased some more today (different) and some really unique moonstone. I'm opening a jewelry busy soon and so accurate gemstone sizes, quality, and reliability as a supplier is really important to me. Gemselect seems to fill all those requirements.

Posted By J in November, 2022

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Overall Rating -> 9

I have been buy from you for years

Posted By JohnA in May, 2023

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Overall Rating -> 9

Have just ordered a couple birthstones, hopefully correct size for the setting. Excited to see!

Posted By Ellymae in March, 2023

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Overall Rating -> 10

It was fast purchasing procesos, very clear and precise, loved It

Posted By Sebastian in March, 2023

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Selected Gemstones

Gemstones A-Z

Buy Marquise Shape 6x3 mm Gems

0.24 ct Marquise Cut Iolite, 5.8 x 3 mm From Brazil

1.77 ct Loose Marquise Cut Sapphire, 6 x 3.1 mm From Tanzania

2.57 ct Marquise Cut Amethyst, 6 x 3.1 mm From Brazil

2.13 ct Yellow Citrine, 6 x 2.9 mm Marquise Cut From Brazil

0.15 ct Marquise Cut Iolite, 6.2 x 3 mm From Madagascar

1.47 ct Loose Pink Sapphire, 5.9 x 3 mm Marquise Cut From Tanzania

1.45 ct Loose Purple Sapphire, 5.9 x 3 mm Marquise Cut From Tanzania

1.71 ct Loose Purple Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

1.68 ct Loose Pink Sapphire, 5.9 x 3 mm Marquise Cut From Tanzania

1.46 ct Loose Purple Sapphire, 5.9 x 2.9 mm Marquise Cut From Tanzania

1.45 ct Yellow Citrine, 5.9 x 3.1 mm Marquise Cut From Brazil

1.36 ct Yellow Citrine, 5.9 x 3 mm Marquise Cut From Brazil

0.57 ct Loose London Blue Topaz, 6.1 x 3 mm Marquise Cut From Brazil

1.4 ct Loose Purple Sapphire, 5.8 x 2.9 mm Marquise Cut From Tanzania

1.72 ct Loose Yellow Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

0.28 ct Marquise Cut Iolite, 5.8 x 2.9 mm From Brazil

2.17 ct Yellow Citrine, 6.1 x 3 mm Marquise Cut From Brazil

1.51 ct Loose Purple Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

2.19 ct Marquise Cut Amethyst, 5.9 x 3 mm From Brazil

1.64 ct Loose Purple Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

1.65 ct Yellow Citrine, 6 x 3 mm Marquise Cut From Brazil

1.34 ct Yellow Citrine, 6.1 x 3 mm Marquise Cut From Brazil

1.92 ct Loose Yellow Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

1.66 ct Yellow Citrine, 6.1 x 3.1 mm Marquise Cut From Brazil

1.78 ct Loose Marquise Cut Sapphire, 6 x 3.1 mm From Tanzania

1.47 ct Loose Purple Sapphire, 5.9 x 2.9 mm Marquise Cut From Tanzania

1.38 ct Loose Purple Sapphire, 6 x 2.9 mm Marquise Cut From Tanzania

2.43 ct Marquise Cut Amethyst, 6 x 3 mm From Brazil

1.68 ct Loose Purple Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

1.65 ct Loose Purple Sapphire, 5.9 x 3 mm Marquise Cut From Tanzania

1.37 ct Loose Pink Sapphire, 5.9 x 3 mm Marquise Cut From Tanzania

1.75 ct Loose Purple Sapphire, 6 x 3.1 mm Marquise Cut From Tanzania

Marquise Shape 6x3 mm Gems

Gemstone Information