Marquise Shape 7 x 3.5 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 7 mm x 3.50 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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Website was incredibly easy and fast to use. Navigation and product outlay was simple and enjoyable to browse. Thank you and have a blessed day!

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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

was just windowshopping and spotted a couple "Very Uncommons", a tsavorite & a demantoid garnet that were both in a size I was looking for, & that I could very easily pay for -- so figured I would grab the tsavo ASAP and got the demantoid to accompany so they wouldn't be lonely.

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Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

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Overall Rating -> 9

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

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Gemstones A-Z

Buy Marquise Shape 7x3.5 mm Gems

25.83 ct Oval Bloodstone, 28.7 x 22.1 mm From Madagascar

2.11 ct Round Cut Strawberry Quartz, 8.2 mm From Russia

3.24 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5 mm

3.17 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 9.4 x 6.6 mm

0.03 ct Green Diamond, 2.1 mm Diamond Cut From India

1.33 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 7.1 x 4.8 mm

2.69 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm

9.74 ct Round Pietersite, 16.9 mm From Namibia

18.48 ct Carved Prehnite, 17.9 x 13.4 mm From South Africa

1.92 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 10.5 x 7.3 mm

3.61 carat Yellow Citrine, Baguette Cut loose Citrine from Brazil, Natural Untreated Gem, 12 x 8.1 mm

14.68 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 17.9 x 12.9 mm

0.58 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 5.9 x 4.2 mm

19.73 carat Bi-color Ametrine, Oval loose Ametrine from Brazil, Natural Untreated Gem, 19.3 x 14.8 mm

5.04 ct Oval Cat's Eye Opal, 13.5 x 9 mm From Madagascar

30 ct Fancy Rhodochrosite, 30.8 x 16.1 mm From South Africa

2.78 carat Sky Blue Topaz, Emerald Cut loose Topaz from Brazil, Natural Gem, 8.2 x 8 mm

27.27 ct Fancy Jasper, 33 x 22.9 mm From Indonesia

19.41 ct Oval Onyx, 25.1 x 18.2 mm From Sri Lanka

0.86 ct Oval Sillimanite Cat's Eye, 5.3 x 4.9 mm From Madagascar

26.7 carat Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 22.3 x 14.9 mm

5.63 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 15.7 x 9.1 mm

4.01 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6 x 4.1 mm

0.61 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 4.9 x 3.9 mm

38.02 ct Gray Jadeite, 26 x 19.7 mm Oval Cut From Myanmar

8.99 ct Brown Moonstone, 15.4 x 11.3 mm Oval Cut From India

2.43 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.4 x 7.4 mm

11.86 ct Octagon Cut Smoky Quartz, 14.5 x 14.5 mm From Brazil

47.13 ct Oval Rose Quartz, 26.4 x 21.4 mm From South Africa

72.72 carat Pear Rhodochrosite, loose Certified Rhodochrosite from South Africa, Natural Untreated Gem, 43 x 20.3 mm

2.76 carat Blue Sapphire, Oval Cabochon loose Sapphire from Madagascar, Natural Gems, 4 x 3.1 mm

0.23 ct Yellow Diamond, 4 mm Diamond Cut From India

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