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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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

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Overall Rating -> 10

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Overall Rating -> 10

great. thank you

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Overall Rating -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

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Overall Rating -> 10

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Overall Rating -> 10

Hello: You do have good website. Vast majority of folks would buy the Gems for its spiritual, physical / energy level, emotional level positive aspects. You have only very brief mention of this aspect of each Gem ..may be you can add little bit more about ways to leverage the beneificial effect of each gems i.e. some practical tips.ThanksRupen Patel

Posted By EarthDeep in February, 2024

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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!

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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.

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Overall Rating -> 10

I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you

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i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

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

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Overall Rating -> 10

Always an easy experience using Gem select.

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Gemstones A-Z

Buy Marquise Shape 7x3.5 mm Gems

0.92 ct Gray Spinel, 5.8 x 4.9 mm Cushion Cut From Tanzania

3.86 carat White Topaz, Square loose Topaz from Brazil, Natural Untreated Gems, 4.1 x 4 mm

1.09 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 5.9 mm

16.79 ct Loose Oval Bloodstone, 26.5 x 18.2 mm From Madagascar

1.17 ct Oval Cut Fire Opal, 9.5 x 6.9 mm From Mexico

5.91 carat Emerald-Cut Emerald, loose Certified Emerald from Zambia, Natural Gem, 11.3 x 10 mm

3.35 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gems, 7.9 x 6 mm

0.74 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 7 x 5 mm

0.82 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 5.9 x 4 mm

0.84 ct Cushion Cut Color-Change Diaspore, 6.8 x 5 mm From Turkey

12.5 ct Round Petal Cut Smoky Quartz, 11.2 mm From Brazil

1.08 ct Loose Green Tourmaline, 6.1 mm Round Cabochon From Mozambique

1.22 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 8 x 5.9 mm

20.11 ct Loose Green Amazonite, 33.8 x 9 mm Pencil Cut From Madagascar

1.89 ct Loose Yellow Sapphire, 4.7 mm Round Cut From Tanzania

8.02 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gem, 13 mm

0.78 ct Oval Cut Fire Opal, 8 x 6.1 mm From Mexico

1.28 ct Loose Orange Hessonite Garnet, 6.8 x 4.9 mm Octagon Cut From Madagascar

1.31 ct Loose Yellow Sapphire, 7.4 x 5.7 mm Cushion Cut From Tanzania

3.74 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.7 x 10.2 mm

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

2.38 ct Round Cut Peridot, 4.5 mm From China

0.15 carat Round Emerald, loose Certified from Colombia, Natural Gem, 3.5 mm

18.26 ct Oval Larimar, 19.9 x 15.1 mm From the Dominican Republic

19.29 ct Oval Onyx, 25.1 x 18.1 mm From Sri Lanka

1.66 carat Yellow Citrine, Carved Flower loose Citrine from Brazil, Natural Untreated Gem, 7.7 x 7.1 mm

42.52 ct Round Hematite, 16.3 mm From Brazil

2.58 ct Round Cut Peridot, 4.6 mm From China

1.25 ct Oval Peridot, 6.1 x 4.2 mm From China

9.25 carat Pear Ruby-Zoisite, loose Certified Ruby-Zoisite from Tanzania, Natural Untreated Gem, 18.3 x 9.9 mm

6.22 ct Rainbow Pyrite, 15.3 x 14.4 mm From Russia

1.25 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 9.3 x 7.2 mm

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