Calibrated 16 x 12 mm Oval Shape Natural Loose Gemstones: GemSelect

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 oval shapes, facet cut and cabochon gems available now in 16 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 usually 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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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 used Gem Select many times over the past 10 years and have always been happy with the product & services

Posted By Ordain in August, 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 -> 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 -> 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 -> 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 -> 10

The website is very easy to use. The search function, filter and sort functions are very helpful.

Posted By Sboro in August, 2023

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Overall Rating -> 10

Everything was fine.

Posted By Matt in March, 2024

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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

I was in the market for birthstones for a lil gift project im doing. I'm no expert in gems or what not but the quality as far as i can tell seems to be spot on.

Posted By PixelComposer in January, 2024

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Overall Rating -> 10

I bought a small ring green so I may practice my jewelry making.

Posted By HairyOtter in July, 2023

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Overall Rating -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

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Overall Rating -> 10

Best place to buy gem stones, dont bother shopping else where. Prices are great, no issues with shipping and customer service is the best.

Posted By J in December, 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 -> 10

The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

Posted By T-bone in October, 2023

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Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

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Gemstones A-Z

Buy Oval Shape 16x12 mm Gems

0.98 ct Yellow Beryl, 8.1 x 7.4 mm Trillion Cut From Madagascar

4.71 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.5 x 4.5 mm

0.56 ct Loose Orange Sapphire, 4.4 x 4.4 mm Cushion Cut From Tanzania

0.41 ct Loose Purple Sapphire, 6.1 x 4.1 mm Oval Cut From Tanzania

0.78 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 5.7 mm

1.98 ct Blue Kyanite, 7.2 x 5 mm Oval Cut From Nepal

0.41 ct Loose Yellow Sapphire, 5.1 x 2.7 mm Marquise Cut From Tanzania

1.71 carat Pink Malaya Garnet, Marquise Cut loose Malaya Garnet from Tanzania, Natural Untreated Gem, 10.8 x 5.4 mm

11.71 ct Yellow Quartz, 9 x 8.9 mm Carved From Brazil

6.82 ct Flower Cut Smoky Quartz, 13.5 x 12.7 mm From Brazil

0.66 ct Loose Orange Sapphire, 4.6 x 4.5 mm Cushion Cut From Tanzania

1.58 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 20.6 x 3 mm

1.73 ct Round Cut Strawberry Quartz, 8 mm From Russia

1.98 carat Orange Zircon, Pear Shape loose Zircon from Cambodia, Natural Untreated Gem, 8.3 x 6.8 mm

14.24 ct Baguette Tiger's Eye, 18.3 x 13.5 mm From Thailand

1.32 ct Oval Checkerboard Labradorite, 7.2 x 6.2 mm From Madagascar

2.31 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.9 mm

1.55 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gem, 6.9 mm

15.76 carat Carved Rose Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16 x 16.7 mm

2.56 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm

18.91 ct Pencil Cut Tiger's Eye, 25.6 x 9.4 mm From Thailand

30.35 ct Cushion Jasper, 30.3 x 22.1 mm From Indonesia

6.04 ct Asscher Cut Rose Quartz, 11 x 11 mm From South Africa

1.23 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 8.5 x 6.5 mm

3.23 ct Yellow Sillimanite, 7.3 x 5.1 mm Oval Cut From Sri Lanka

16.82 ct Round Pietersite, 18.6 mm From Namibia

2.53 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 4.1 mm

3.39 ct Loose Oval Concave Cut Mystic Quartz, 9.1 x 7 mm From Brazil

5.86 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 11 x 8.9 mm

0.39 carat Pear Shape Emerald, loose Certified Emerald from Colombia, Natural Gem, 6 x 4 mm

4.05 ct Oval Rutile Quartz, 12.8 x 8.8 mm From India

1.64 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 10.3 x 7 mm

Gemstone Information

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