Calibrated Trillion Cut Gemstones in Size 15x15 mm

Some people by gems by color or prize, 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 15 mm x 15 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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Convenient selection, arrival on time

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Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

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Overall Rating -> 7

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

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was just windowshopping and spotted a couple "Very Uncommons", a tsavorite & a demantoid garnet that were both in a size I was looking for, & that I could very easily pay for -- so figured I would grab the tsavo ASAP and got the demantoid to accompany so they wouldn't be lonely.

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this was very easy im exited to get my order

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Overall Rating -> 9

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Gemstones A-Z

Buy Trillion Shape 15x15 mm Gems

1.38 ct Yellow Sphene, 6.9 x 6.1 mm Oval Cut From Sri Lanka

2.94 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 9.9 mm

0.9 carat Opal, loose Certified Opal from Ethiopia, Natural Gem, 8.9 x 6.4 mm

4.85 carat Trillion Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.1 mm

3.4 carat Swiss Blue Topaz, loose Topaz from Brazil, Natural Gems, 8.2 x 6 mm

4.33 ct Round Cut Smoky Quartz, 11.5 mm From Brazil

5.06 ct Round Concave Cut Smoky Quartz, 12 mm From Brazil

16.8 ct Yellow Quartz, 20.1 x 15.1 mm Oval Checkerboard From Brazil

17.75 ct Fancy Jasper, 20.5 x 14.1 mm From Indonesia

0.61 ct Loose Orange Sapphire, 4.1 x 4.1 mm Cushion Cut From Tanzania

18.54 carat Swiss Blue Topaz, Carved Fruit loose Topaz from Brazil, Natural Gem, 23.5 x 12.8 mm

4.24 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gems, 6.7 x 5 mm

8.89 ct Oval Actinolite Cat's Eye, 14.1 x 13.3 mm From the United States

2.51 carat Round Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 4.7 mm

0.59 ct Loose Yellow Sapphire, 3.6 x 3.5 mm Princess Cut From Tanzania

22.29 ct Oval Peanut Wood, 29.1 x 18.5 mm From Australia

20.16 ct Oval Tiger's Eye, 24.7 x 16.7 mm From Thailand

56.23 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 27 x 23.9 mm

0.57 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6 x 4.1 mm

0.44 ct Blue Kyanite, 3.7 mm Round Cut From Nepal

1.56 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.1 x 8 mm

0.73 ct Loose Pink Sapphire, 6.1 x 5.1 mm Oval Cut From Madagascar

1.26 ct Yellow Beryl, 8 x 7.5 mm Trillion Cut From Madagascar

0.61 carat Yellow Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 5 x 4.1 mm

7.86 ct Oval Quartz With Marcasite, 14.9 x 12.2 mm From Brazil

0.8 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 6.1 x 4.4 mm

1.78 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 17.1 x 3.5 mm

2.32 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gems, 6.8 x 5 mm

2.41 ct Purple Kunzite, 7.8 x 6.4 mm Cushion Cut From Afghanistan

3.76 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.8 x 9.6 mm

2.25 ct Oval Cut Andalusite, 5 x 3.1 mm From Brazil

0.65 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.7 x 4.7 mm

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