Calibrated 12 x 12 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 12 mm x 12 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

blessed be the lord blessed be the saved blessed be the work blessed be the traveled i write down my good times in these stones and when times are gray i can still se the sunny days refract in these stones

Posted By Kickbass.2 in May, 2023

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Overall Rating -> 10

My only complaint is that there are so many beautiful and affordable stones that I get distracted from what I planned to order.

Posted By Phoenix in March, 2024

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Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 2023

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Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

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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

Posted By Sue in April, 2023

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Overall Rating -> 10

I find the website user friendly.

Posted By Becky in August, 2023

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Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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Overall Rating -> 10

this was very easy im exited to get my order

Posted By Mr. in April, 2024

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Overall Rating -> 10

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

Posted By Daws in July, 2023

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Overall Rating -> 7

I feel pretty good so far, pending the delivery of the item ordered.

Posted By Steve in November, 2023

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Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

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Overall Rating -> 10

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

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Overall Rating -> 10

Super easy to do business for great products.

Posted By BoBBy in January, 2024

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Gemstones A-Z

Buy Trillion Shape 12x12 mm Gems

3.8 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 6.8 x 4.9 mm

4.24 carat Swiss Blue Topaz, Carved Flower loose Topaz from Brazil, Natural Gem, 14.4 x 11.3 mm

34.11 ct Oval Hematite, 22.9 x 17.8 mm From Brazil

4.76 ct Green Jade, 12.4 x 10.4 mm Oval Cut From Myanmar

0.6 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 4.6 mm

17.09 carat Pink Kunzite, Pear Shape loose Kunzite from Afghanistan, Natural Untreated Gem, 23.9 x 10.9 mm

2.17 ct Blue Apatite, 4.8 x 3.9 mm Oval Cut From Madagascar

3.95 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6 x 4.1 mm

25.13 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 36.2 x 18.8 mm

2.74 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 6.1 x 4.3 mm

9.73 carat Pear Shape Hiddenite, loose Certified Hiddenite from Afghanistan, Natural Untreated Gem, 16.5 x 10.6 mm

0.71 ct Loose Purple Sapphire, 6.4 x 4.5 mm Oval Cut From Madagascar

2.5 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.1 x 9.1 mm

1.69 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.3 x 6.8 mm

1.18 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 4.9 mm

4.48 ct Oval Star Ruby, 10.4 x 8.8 mm From Madagascar

11.46 ct Round Cut Smoky Quartz, 15.5 mm From Brazil

3.83 ct Red Andesine Labradorite, 11.2 x 9.1 mm Oval Cut From Congo

1.84 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6 x 6 mm

1.61 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

1.89 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.3 mm

1.09 ct Baguette Cut Kornerupine, 5.4 x 4.8 mm From Sri Lanka

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

21.04 ct Fancy Coral, 18.6 x 11.7 mm From Indonesia

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

5.77 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 7 mm

62.57 ct Cushion Jasper, 33.9 x 21.8 mm From Indonesia

0.21 carat Baguette Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 3.5 x 2.5 mm

1.58 ct Round Onyx, 7.2 mm From Sri Lanka

3.63 carat Pear Larimar, loose Certified Larimar from the Dominican Republic, Natural Untreated Gem, 13 x 9.1 mm

45.27 ct Oval Chrysocolla, 36.3 x 25 mm From Australia

0.89 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4.1 mm

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