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 Job today! No issues!

Posted By Samlovesgems777 in August, 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 love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

Posted By Cahall in March, 2024

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Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

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Overall Rating -> 10

Easy to navigate

Posted By G Funk in December, 2023

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The website design is a bit finicky for mobile, but Im sure its most likely just a mobile issue. Amazing selection of products, great prices.

Posted By Kuba in December, 2023

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Overall Rating -> 10

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

Posted By Happiness in January, 2024

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Overall Rating -> 10

Love gemselect

Posted By Joshua Howard in March, 2024

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Overall Rating -> 10

I was looking for ammolite for my husband. Other websites are not always clear about whether they have genuine ammolite or simulated ammolite. I have purchased from GemSelect before and trust that the stones are genuine. Finding the stones I want is easy, and I love all of the search filter options!

Posted By Ana in September, 2023

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

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Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

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Overall Rating -> 10

Perfect size I was looking for and great price

Posted By Izzy in September, 2023

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Overall Rating -> 10

It was easy to search and find what i wanted

Posted By Gunner in November, 2023

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Overall Rating -> 10

I have used GemSelect for several years and plan to shop more in the further. This is a good source of information on gemstones. I love looking at and learning about them. Lot more than I ever knew existed.

Posted By Bikerwalrus in October, 2023

Source: Bizrate

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.

Posted By Iggywiggly in January, 2024

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Gemstones A-Z

Buy Trillion Shape 16x16 mm Gems

4.14 ct Oval Prehnite, 7.1 x 5.5 mm From South Africa

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

2.89 ct Round Cat's Eye Scapolite, 8.8 mm From Madagascar

3.49 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

0.76 ct Octagon Cut Peridot, 6.3 x 4.9 mm From China

10.46 carat Black Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 13.8 x 12.3 mm

3.88 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 9.2 mm

1.92 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gem, 6.8 mm

4.15 carat Pink Morganite, Pear loose Morganite from Afghanistan, Natural Untreated Gem, 15.9 x 8.1 mm

5.43 ct Blue Star Sapphire, 7 x 5.2 mm Oval Cut From Thailand

0.77 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7.9 x 3.6 mm

0.22 carat Baguette Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 4 x 3.1 mm

0.62 ct Yellow Sphalerite, 4.7 mm Round Cut From Spain

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

5.24 ct Oval Star Ruby, 11 x 8.6 mm From Madagascar

5.08 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 12.1 x 6.1 mm

3.3 carat Blue Sapphire, Briolette with Hole loose Sapphire from Sri Lanka, Natural Gems, 5.4 mm

17.95 ct Marquise Rainbow Moonstone, 21.4 x 9 mm From the United States

1.7 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 6.7 mm

6.75 ct Fancy Fire Agate, 13 x 10.7 mm From Mexico

0.74 carat Teal Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.9 x 4.8 mm

0.52 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.3 x 4.2 mm

8.05 ct Oval Pietersite, 18.7 x 10.6 mm From Namibia

1.93 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.5 x 3.9 mm

51.95 ct Oval Ruby-Zoisite, 34.6 x 26.7 mm From Tanzania

9.07 carat Pear Dendritic Agate, loose Certified Dendritic Agate from India, Natural Untreated Gem, 19.9 x 14 mm

3.34 ct Blue Star Sapphire, 6.8 x 5 mm Oval Cut From Thailand

27.4 ct Round Maw-Sit-Sit, 16.5 mm From Myanmar

10.19 ct Round Agate, 12.5 mm From Indonesia

2.98 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12.1 x 9.8 mm

6.47 ct Oval Star Moonstone, 10.9 x 9.9 mm From India

0.62 ct Pink Spinel, 5 mm Round Cut From Tanzania

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