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

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

Posted By Tim in April, 2024

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Overall Rating -> 9

Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.

Posted By Bob in November, 2023

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Overall Rating -> 9

I am of the opinion that the company gem select cares about the product beautiful gems it sells and the cost of the gem I purchased was small i was treated as if it cost a lot of money and product was described in detail and i felt good about the little stones i had ordered.

Posted By Sparkle in March, 2024

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Overall Rating -> 10

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.

Posted By Kittypie070 in April, 2024

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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

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Great Job today! No issues!

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Convenient selection, arrival on time

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Overall Rating -> 10

love yall

Posted By Rock hunter in August, 2023

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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

Excellent experience!

Posted By Steph in April, 2023

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Overall Rating -> 10

I’ve enjoyed purchasing stones from this site. It’s convenient and fairly priced.

Posted By Chico in May, 2023

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Overall Rating -> 10

I have actually done business with them before and was quite satisfied with them then.My Mother collected turtle items and when I saw the Mother of Pearl turtle...I just thought of her and decided to buy it. It's even tinier than I thought, but so adorable!The gemstones I bought are for jewelry for my daughter's birthday.

Posted By Ktreva52 in February, 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

the searching format was easy to find what i needed. It helped to be able to sort Lowest price to Highest because i wasnt looking to spend too much but i did want an actual stone and not imitation.

Posted By PixelComposer in January, 2024

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

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Gemstones A-Z

Buy Trillion Shape 16x16 mm Gems

0.69 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 7.1 x 5.1 mm

2.29 ct Oval Sillimanite Cat's Eye, 7.1 x 4.7 mm From Madagascar

1.8 ct Round Cut Peridot, 3.9 mm From China

2.68 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9.1 x 7 mm

1.1 ct Marquise Cut Peridot, 8.1 x 4.1 mm From China

2.59 carat White Zircon, Round loose Zircon from Cambodia, Natural Gem, 7.6 mm

27.65 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18 x 17.3 mm

5.64 ct Oval Tiger's Eye, 14.1 x 10.3 mm From India

4.35 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.8 x 5.1 mm

17.09 ct Round Checkerboard Labradorite, 16.1 mm From Madagascar

15.27 ct Black Spinel, 12 mm Round Rose Cut From Thailand

40.61 ct Marquise Jasper, 33.9 x 16.3 mm From Mexico

1.82 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gem, 8.9 x 6.7 mm

12.51 ct White Jadeite, 19.6 x 15.1 mm Oval Cut From Myanmar

0.64 ct Loose Purple Spinel, 5.9 x 3.6 mm Octagon Cut From Tanzania

2.46 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.9 x 7.5 mm

4.73 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.2 x 10.1 mm

0.59 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 5.6 x 3.9 mm

2.07 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.3 x 6.9 mm

2.97 carat Orange Spessartite Garnet, Round loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 5.2 mm

8.96 ct Blue Star Sapphire, 9.3 mm Round Cut From Thailand

15.71 ct Yellow Quartz, 13.8 x 13.8 mm Octagon Concave Cut From Brazil

2.2 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.6 x 7 mm

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

73.45 carat Pear Howlite, loose Certified Howlite from the United States, Natural Untreated Gem, 45.9 x 32.5 mm

6.96 carat Orange Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 11.4 x 10.3 mm

15.85 carat Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 20 x 15.1 mm

3.99 ct Brown Moonstone, 7.6 x 7.5 mm Carved From India

2.27 ct Loose Pear Cut Mystic Quartz, 8.1 x 6 mm From Brazil

6.63 ct Marquise Slice Ruby in Fuchsite, 21.5 x 11.1 mm From Ethiopia

22.34 ct Oval Rainbow Moonstone, 26.3 x 13.8 mm From the United States

5.11 ct Yellow Quartz, 7.3 x 7.2 mm Carved From Brazil

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