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

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

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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

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Overall Rating -> 9

making my own jewelry for my birth stone

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Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

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Overall Rating -> 10

Todo muy bien en la compra ahora esperar recibir el pedido.

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Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

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Overall Rating -> 9

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

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Excellent site.

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Overall Rating -> 10

I enjoyed browsing though different varieties of rubies. I felt that the experience was simple and easy to navigate!

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It was simple and clear to understand.

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Everything was fine.

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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

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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

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Gemstones A-Z

Buy Marquise Shape 7x3.5 mm Gems

0.98 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 7.1 x 5.3 mm

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

4.38 carat Yellow Citrine, Briolette loose Citrine from Brazil, Natural Untreated Gem, 11.3 mm

0.99 ct Blue Kyanite, 7.2 x 5.2 mm Oval Cut From Nepal

0.23 ct Black Diamond, 3 mm Diamond Cut From India

0.91 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.1 x 4.1 mm

24.03 ct Loose Green Amazonite, 27.2 x 10.2 mm Pencil Cut From Madagascar

1.05 ct Blue Kyanite, 7.1 x 5 mm Oval Cut From Nepal

4.54 ct Cushion Onyx, 10.9 x 10.9 mm From Sri Lanka

0.56 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 5.2 x 5.1 mm

0.53 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.1 x 4.1 mm

10.43 ct Loose Baguette Lapis Lazuli, 14.6 x 9.6 mm From Afghanistan

1.72 ct Purple Spinel, 6.7 x 6.6 mm Cushion Cut From Tanzania

7.51 ct Round Checkerboard Smoky Quartz, 8.1 mm From Brazil

4.75 carat Sky Blue Topaz, Trillion loose Topaz from Brazil, Natural Gems, 6.9 x 7 mm

2.27 ct White Moonstone, 7.6 mm Round Cut From India

21.02 ct Oval Tiger's Eye, 24.8 x 16.6 mm From Thailand

1.6 ct Blue Apatite, 5.1 x 4.1 mm Oval Cut From Madagascar

1.19 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.1 x 4.2 mm

77.09 ct Oval Chrysocolla, 42 x 33.4 mm From Australia

2.15 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gems, 6.8 x 5.1 mm

8.16 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 14 x 7.9 mm

2.22 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.7 x 7.2 mm

13.77 ct Oval Larimar, 20.1 x 15 mm From the Dominican Republic

25.19 carat Pear Peanut Wood, loose Certified Peanut Wood from Australia, Natural Untreated Gem, 31.7 x 21.5 mm

59.54 carat Uvarovite Garnet Drusy, loose Certified Uvarovite Garnet Drusy from Russia, Natural Untreated Gem, 38.1 x 25 mm

0.36 ct Blue Kyanite, 3.8 mm Round Cut From Nepal

0.53 ct Oval Chrysoberyl Cat's Eye, 4.7 x 3.9 mm From Sri Lanka

3.2 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 8.9 mm

7.85 ct Fancy Boulder Opal, 16.4 x 11.8 mm From Australia

5.52 carat Sky Blue Topaz, Emerald Cut loose Topaz from Brazil, Natural Gems, 8.2 x 8.1 mm

6.96 ct Loose Orange Sapphire, 14 x 10.8 mm Oval Cut From Thailand

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