Calibrated 13 x 13 mm Trillion Shape Loose Natural Gemstones from ...

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 Trillion shapes, facet cut and cabochon gems available now in 13 mm x 13 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not meant nor expected to be cut to exact measurements. 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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

Easy to use website, made it very easy to buy. Will shop here again.

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Overall Rating -> 10

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

Posted By T-bone in October, 2023

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Overall Rating -> 10

Purchasing from Gem Select was a pleasant and easy experience. The photos of the stones I was interested in were an accurate depiction of the stones I received. Ordering was easy and the items arrived within a week. Over all it was a very positive experience.

Posted By Dee in September, 2023

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Overall Rating -> 9

The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

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Overall Rating -> 9

I was in the market for birthstones for a lil gift project im doing. I'm no expert in gems or what not but the quality as far as i can tell seems to be spot on.

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Overall Rating -> 10

Everything was fine.

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Overall Rating -> 10

Very large selection of items and we used the stones to have several pieces of jewelry made for us.

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Overall Rating -> 10

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

Posted By Jf in January, 2024

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Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

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Overall Rating -> 10

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Overall Rating -> 10

Pleasant.

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Gemstones A-Z

Buy Trillion Shape 13x13 mm Gems

2.11 ct Blue Kyanite, 7.1 x 5.1 mm Oval Cut From Nepal

2.27 ct Purple Kunzite, 7.8 x 5.4 mm Octagon Cut From Afghanistan

14.11 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 26.3 x 19.1 mm

3.21 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

12.44 ct Yellow Quartz, 16.2 mm Round Concave Cut From Brazil

4.81 ct Oval Cat's Eye Opal, 13 x 8.2 mm From Madagascar

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

42.89 ct Carved Rubellite Tourmaline, 47.2 mm From Mozambique

1.36 ct Loose Oval Cut Black Opal, 10.2 x 7.8 mm From Ethiopia

31.5 ct Oval Jasper, 30.1 x 20.6 mm From Indonesia

3.2 ct Asscher Cut Rose Quartz, 8.9 x 8.8 mm From South Africa

1.1 ct Yellow Beryl, 8 x 6 mm Oval Cut From Madagascar

1.72 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 14.9 x 3.6 mm

7.17 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 15 x 7 mm

2.19 ct Pink Morganite, 8.2 x 6.2 mm Oval Cut From Afghanistan

26.43 ct Loose Brown Jasper, 37.3 x 9.6 mm Pencil Cut From Indonesia

27.81 carat Orange Spessartite Garnet, Carved Rose loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 13.9 x 12.8 mm

12.95 ct Marquise Rainbow Moonstone, 25.5 x 11.4 mm From the United States

3.47 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 12.1 x 6.1 mm

50.62 ct Oval Chrysocolla, 36.8 x 24.3 mm From Australia

0.46 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.6 x 3.7 mm

2.92 ct Round Cat's Eye Scapolite, 8.8 mm From Madagascar

19.57 ct Baguette Tiger's Eye, 15.9 x 11.9 mm From Thailand

4.09 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12.1 x 6 mm

2.59 ct Yellow Sphene, 9.3 x 7.7 mm Oval Cut From Sri Lanka

1.86 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 x 7 mm

1.84 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 11.8 x 6 mm

0.71 carat Pink Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 6 x 4.9 mm

4.79 ct Oval Cut Peridot, 7.9 x 5.7 mm From China

3.69 ct Round Checkerboard Smoky Quartz, 8 mm From Brazil

1.28 ct Loose Yellow Sapphire, 5 mm Round Cut From Tanzania

20.7 ct Oval Rutile Quartz, 21.9 x 13.3 mm From India

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