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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Overall Rating -> 10

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.

Posted By AV in May, 2023

Source: Bizrate

Overall Rating -> 10

Easy to use website, made it very easy to buy. Will shop here again.

Posted By Bjorn in January, 2024

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Overall Rating -> 10

The site is very easy to use and I will continue to shop here. The quality is superb

Posted By Genia in January, 2024

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Overall Rating -> 9

Overall good, shipping prices just seem a little on the high side.

Posted By Steve in August, 2023

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Overall Rating -> 10

Convenient selection, arrival on time

Posted By Alin in February, 2024

Source: Bizrate

Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 2023

Source: Bizrate

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

Very good, very fast, everything as described.

Posted By B in October, 2023

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Overall Rating -> 10

all good

Posted By John in December, 2023

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Overall Rating -> 10

The website is easy to navigate and the images are incredible.

Posted By Lindsy in October, 2023

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Overall Rating -> 8

I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.

Posted By Mark in March, 2024

Source: Bizrate

Overall Rating -> 8

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

Posted By Ralli in August, 2023

Source: Bizrate

Overall Rating -> 10

Love the variety of stones, sizes and the prices

Posted By Dorita in March, 2024

Source: Bizrate

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 !!

Posted By Steve in July, 2023

Source: Bizrate

Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

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Gemstones A-Z

Buy Marquise Shape 6x3 mm Gems

15.75 ct Oval Jasper, 31.7 x 14.2 mm From Indonesia

2.14 carat Swiss Blue Topaz, Fancy-Cut loose Topaz from Brazil, Natural Gems, 7.3 x 5 mm

1.41 ct Oval Sillimanite Cat's Eye, 7.6 x 5.1 mm From Madagascar

1.4 ct Loose White Sapphire, 2.7 x 2.7 mm Princess Cut From Madagascar

35.99 ct Cushion Fossil Coral, 20.4 x 12.7 mm From Indonesia

3.31 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 12 x 10 mm

10.97 ct Round Rutile Quartz, 14.7 mm From India

0.4 ct Loose Yellow Sapphire, 5.2 x 3.1 mm Octagon Cut From Tanzania

0.71 ct Loose Yellow Sapphire, 5.1 x 4.1 mm Octagon Cut From Tanzania

0.56 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.3 x 4.2 mm

0.6 ct Loose Orange Sapphire, 4.3 x 4.3 mm Cushion Cut From Tanzania

2.05 ct Cushion Cut Peridot, 7.9 x 7.1 mm From Myanmar

3.06 ct Loose Yellow Sapphire, 6.2 x 5.1 mm Oval Cut From Tanzania

1.94 carat Red Malaya Garnet, Marquise Cut loose Malaya Garnet from Tanzania, Natural Untreated Gem, 11.7 x 5.7 mm

0.57 ct Loose Purple Sapphire, 5.8 x 4.2 mm Oval Cut From Tanzania

2.23 ct Oval Prehnite, 8.3 x 6.6 mm From South Africa

1.65 carat Emerald Cut Emerald, loose Certified Emerald from Zambia, Natural Gem, 7.4 x 7.2 mm

3.61 ct White Moonstone, 11.6 x 8.5 mm Oval Cut From India

1.33 carat Sky Blue Topaz, loose Topaz from Brazil, Natural Gem, 10 x 5 mm

2.75 ct Oval Cut Strawberry Quartz, 8.2 x 6.1 mm From Russia

6.17 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15.9 x 11.8 mm

3.8 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 9 mm

3.25 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5.1 mm

3.23 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 8.9 mm

7.77 ct Yellow Apatite, 10.7 x 10.4 mm Asscher Cut From Madagascar

0.73 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6 x 5.9 mm

25.28 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 20.7 x 14 mm

2.13 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.9 mm

58.4 ct Baguette Tiger's Eye Matrix, 27.3 x 22.6 mm From Mexico

1.2 ct Oval Strawberry Quartz, 7.7 x 5.9 mm From Russia

3.9 ct Round Cut Peridot, 6 mm From China

0.62 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 5.5 x 4.5 mm

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