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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Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 2023

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Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 2023

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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.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

Selection ability was straightforward and easy.

Posted By Dave in May, 2023

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Overall Rating -> 10

I have used Gem Select many times over the past 10 years and have always been happy with the product & services

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Overall Rating -> 10

Easy to navigate

Posted By G Funk in December, 2023

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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 -> 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

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

Posted By Meow in June, 2023

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Great Job today! No issues!

Posted By Samlovesgems777 in August, 2023

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Overall Rating -> 9

Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

Posted By Erick in July, 2023

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Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

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My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

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Gemstones A-Z

Buy Trillion Shape 15x15 mm Gems

1.22 ct Round Checkerboard Smoky Quartz, 7.1 mm From Brazil

0.64 ct Loose Trillion Cut Mystic Quartz, 6.1 x 6 mm From Brazil

1.67 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.2 mm

4.06 ct Brown Moonstone, 6.7 x 6.5 mm Carved From India

1.69 ct Yellow Beryl, 9.2 x 6.9 mm Cushion Cut From Brazil

4.81 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.9 x 9.9 mm

2.43 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9 x 7.5 mm

4.9 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.2 x 8 mm

1.25 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 11.7 x 3.8 mm

1.07 carat Brown Malaya Garnet, Marquise Cut loose Malaya Garnet from Tanzania, Natural Untreated Gem, 9.8 x 5.1 mm

3.37 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 11 x 8.9 mm

1.5 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.1 mm

4.67 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15 x 10.3 mm

1.73 ct Loose Pink Sapphire, 3.9 x 3.8 mm Trillion Cut From Tanzania

17.47 ct Carved Prehnite, 19.7 x 12.6 mm From South Africa

15.82 ct Loose Oval Lapis Lazuli, 16.3 x 12.3 mm From Afghanistan

1.17 ct Violet Spinel, 5.6 x 5.6 mm Cushion Cut From Tanzania

10.86 ct Oval Maw-Sit-Sit, 14.2 x 11.2 mm From Myanmar

3.86 ct Round Checkerboard Smoky Quartz, 8 mm From Brazil

2.2 ct Green Sphene, 8.7 x 6.9 mm Oval Cut From Sri Lanka

2.88 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.5 x 4.9 mm

6.59 ct Oval Star Ruby, 11.4 x 9 mm From Madagascar

2.38 ct Octagon Cut Peridot, 6 x 4 mm From China

1.24 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5 mm

3.7 ct Pink Morganite, 10 mm Round Cut From Afghanistan

2.31 carat Swiss Blue Topaz, Trillion-Cut loose Topaz from Brazil, Natural Gems, 7.1 x 7 mm

2.96 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.6 mm

4.76 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 10.1 mm

4.94 ct Carved Prehnite, 14.9 x 10.2 mm From South Africa

8.15 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm

9.04 ct Round Labradorite, 10.1 mm From Madagascar

26.7 ct Yellow Jadeite, 39.8 x 14 mm Carved From Myanmar

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