Marquise Shape 4 x 2 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 4 mm x 2 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

This is only the second time I have ordered from GemSelect. I am a prolific gemstone collector and I wish I had found this site sooner!

Posted By Beachcomber in September, 2023

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Overall Rating -> 10

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

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Overall Rating -> 10

I found it to be easy to browse and easy to use

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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

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

Posted By Teemo in February, 2024

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Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

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Overall Rating -> 7

I feel pretty good so far, pending the delivery of the item ordered.

Posted By Steve in November, 2023

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

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Overall Rating -> 10

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

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Overall Rating -> 10

I love GemSelect, photos and details are great.

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Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 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

I love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

Posted By Cahall in March, 2024

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Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

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Overall Rating -> 10

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Posted By Becky in August, 2023

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Gemstones A-Z

Buy Marquise Shape 4x2 mm Gems

5.5 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 16.8 x 11.1 mm

2.03 ct Yellow Sphene, 7.3 x 6.8 mm Oval Cut From Sri Lanka

2.95 ct Yellow Apatite, 8.1 x 8 mm Square Cut From Madagascar

14.51 carat Black Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 18.8 x 10.7 mm

5.26 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15 x 10.1 mm

1.3 ct Oval Cut Peridot, 7.3 x 6 mm From China

25.29 ct Oval Pietersite, 20.2 x 15.1 mm From Namibia

0.87 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 5.2 x 5.2 mm

3.93 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.5 x 9.5 mm

4.03 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12 x 5.9 mm

0.85 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 10.7 x 3.4 mm

0.39 ct Loose Purple Sapphire, 5.8 x 4.1 mm Oval Cut From Madagascar

0.84 carat Yellow Sphene, Pear Shape loose Sphene from Sri Lanka, Natural Untreated Gem, 7.5 x 5.1 mm

1.87 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.5 mm

17.03 ct Marquise Dendritic Agate, 29 x 14.6 mm From India

6.75 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.1 mm

2.88 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 7.9 x 7.3 mm

26.65 ct Octagon / Emerald Cut Lapis Lazuli, 25.4 x 15.1 mm From Afghanistan

0.71 ct Octagon Cut Color-Change Diaspore, 6.1 x 4.4 mm From Turkey

1.31 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.2 x 4.1 mm

2.5 carat Yellow Citrine, Baguette Cut loose Citrine from Brazil, Natural Untreated Gem, 12 x 6.2 mm

1.47 ct Pink Morganite, 7.2 mm Round Cut From Afghanistan

6.63 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.1 x 10.7 mm

3.59 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 8.8 mm

1.64 carat White Topaz, Marquise Cut loose Topaz from Brazil, Natural Untreated Gem, 11.7 x 4.9 mm

17.55 ct Octagon / Emerald Cut Hematite, 19.7 x 14.4 mm From Brazil

23.04 ct Marquise Hematite, 28.1 x 13.8 mm From Brazil

35.01 carat Violet Kunzite, Pear loose Kunzite from Afghanistan, Natural Untreated Gem, 28.1 x 18.1 mm

3.37 ct Round Prehnite, 6.9 mm From South Africa

31.1 ct Oval Chrysocolla, 28.6 x 21.3 mm From Australia

1.76 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8.2 x 6.1 mm

1.51 ct Blue Star Sapphire, 7.1 x 5.2 mm Oval Cut From Thailand

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