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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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.

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The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

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Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

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Gemstones A-Z

Buy Marquise Shape 6x3 mm Gems

29.67 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 21.3 x 15.3 mm

2.14 carat Opal, loose Certified Opal from Ethiopia, Natural Gem, 14.5 x 7.8 mm

3.1 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 11.4 x 8.8 mm

0.16 ct White Diamond, 2.7 mm Diamond Cut From India

4.26 ct Round Labradorite, 10 mm From Madagascar

2.1 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 5.9 x 4.1 mm

35.84 ct Drilled Sphere Rhodochrosite, 15.4 mm From South Africa

58 ct Brown Jasper, 30.5 x 26.2 mm Oval Cut From Indonesia

15.56 ct Trillion Tiger's Eye Matrix, 18.9 x 17.4 mm From Mexico

4.1 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 8.9 mm

0.52 carat Yellow Beryl, Pear Shape loose Beryl from Brazil, Natural Untreated Gem, 6.9 x 4.9 mm

38.29 ct Trillion Jasper, 30.5 x 27.2 mm From Indonesia

4.2 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.9 x 10 mm

3.07 ct Green Agate, 15.6 x 8.9 mm Carved From India

2.11 ct Loose Yellow Sapphire, 3.6 mm Diamond Cut From Tanzania

0.9 ct Octagon Cut Peridot, 7.1 x 5.1 mm From China

1.31 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 6 x 6 mm

4.14 ct Round Cut Smoky Quartz, 11 mm From Brazil

0.97 carat Yellow Beryl, Pear Shape loose Beryl from Madagascar, Natural Untreated Gem, 8.3 x 5.9 mm

3.62 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7 x 5.3 mm

2.59 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 4.1 mm

3.63 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12 x 10 mm

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

0.62 carat Blue Sapphire, Diamond-Cut loose Sapphire from Madagascar, Natural Gem, 5.2 mm

2.3 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 11.4 x 8.1 mm

0.89 ct Oval Peridot, 6.1 x 4.2 mm From China

0.76 carat Yellow Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 7.4 x 5.4 mm

4.33 carat Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.5 x 10.7 mm

1.48 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.1 x 3.2 mm

0.16 ct Oval Chrysoberyl Cat's Eye, 3.2 x 3.1 mm From Sri Lanka

2.05 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 7.1 x 7.1 mm

2.37 ct Yellow Apatite, 9.8 x 7.8 mm Oval Cut From Madagascar

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