Calibrated 16 x 16 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 16 mm x 16 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

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

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Overall Rating -> 10

Easy to navigate

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Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

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Overall Rating -> 10

Very good customer service. I had an issue on my end with shipping and I received a response the next day!

Posted By Orphanboy in December, 2023

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Overall Rating -> 10

Very Good

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Overall Rating -> 10

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

The site is very easy to use and I will continue to shop here. The quality is superb

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it was good

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Overall Rating -> 10

My first order. I am anxious to see if what I ordered is what I receive.

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Overall Rating -> 10

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Overall Rating -> 10

Easy to use as always and in all steps from opening site to paying.

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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!

Posted By Orchidisle in February, 2024

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Overall Rating -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

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Gemstones A-Z

Buy Trillion Shape 16x16 mm Gems

3.44 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.1 x 4.2 mm

3.16 carat Oval Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 7.9 x 6.1 mm

1.28 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 x 5.1 mm

33.58 ct Oval Jasper, 32.1 x 19.7 mm From Indonesia

4.29 ct Oval Spectrolite, 10.1 x 8.2 mm From Finland

0.48 ct Loose Pink Sapphire, 5.7 x 4 mm Oval Cut From Madagascar

3.35 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 6.8 mm

16.95 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 10.7 x 14 mm

8.96 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 14 x 9.9 mm

38.55 ct Oval Jasper, 35.4 x 21.4 mm From Indonesia

0.13 ct Black Diamond, 2 x 1.9 mm Princess Cut From India

6.33 ct Round Larimar, 11.7 mm From the Dominican Republic

4.8 carat Yellow Agate, Pear loose Agate from India, Natural Gem, 12.8 x 10.5 mm

32.64 ct Loose Oval Bloodstone, 36.5 x 24.5 mm From Madagascar

6.76 ct Asscher Cut Rose Quartz, 11.6 x 11.4 mm From South Africa

0.63 ct Loose Orange Sapphire, 5.9 x 4.2 mm Oval Cut From Tanzania

0.53 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.9 x 3.9 mm

2.28 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10.1 x 5.1 mm

0.76 ct Cushion Cut Color-Change Diaspore, 5.4 x 5.2 mm From Turkey

8.34 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 14.1 x 8.2 mm

3.87 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 9.1 mm

0.92 ct Blue Green Apatite, 6.9 x 5.1 mm Oval Cut From Madagascar

3.59 carat Sky Blue Topaz, loose Topaz from Brazil, Natural Gems, 7.2 x 5 mm

43.13 ct Cushion Pyrite, 27.3 x 22.1 mm From Russia

0.8 ct Oval Cut Peridot, 7 x 5.1 mm From China

0.92 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 4.9 x 4.9 mm

11.05 ct Round Rutile Quartz, 11.2 mm From India

36.14 ct Oval Jasper, 29.8 x 24.3 mm From Indonesia

7.78 ct Loose Pear Dendritic Agate, 14.1 x 10.1 mm From India

1.79 carat Yellow Citrine, Baguette Cut loose Citrine from Brazil, Natural Untreated Gem, 10.2 x 5.1 mm

21.53 ct Oval Maw-Sit-Sit, 16.7 x 13.7 mm From Myanmar

5.32 ct Round Labradorite, 11.1 mm From Madagascar

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