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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Gemstone Information

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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.

Posted By Iggywiggly in January, 2024

Source: Bizrate

Overall Rating -> 10

Great selection, I love your site! Great product visibility, information, etc.

Posted By John in February, 2024

Source: Bizrate

Overall Rating -> 10

Easy to find products I want. I've ordered several times from gem select and never any problems. Will order again. Thank you.

Posted By Ray in January, 2024

Source: Bizrate

Overall Rating -> 10

first time here sooooooooooo we will seeeee!!!!! so far so good!!!!!!

Posted By Seastone 56 in October, 2023

Source: Bizrate

Overall Rating -> 10

great. thank you

Posted By Carrotroller in July, 2023

Source: Bizrate

Overall Rating -> 10

Great selection and excellent website.

Posted By JBW in October, 2023

Source: Bizrate

Overall Rating -> 10

I purchase all of my stones from GemSelect! They're the best I've found for both selection and value.

Posted By Terry in June, 2023

Source: Bizrate

Overall Rating -> 10

Purchasing from Gem Select was a pleasant and easy experience. The photos of the stones I was interested in were an accurate depiction of the stones I received. Ordering was easy and the items arrived within a week. Over all it was a very positive experience.

Posted By Dee in September, 2023

Source: Bizrate

Overall Rating -> 10

Great site

Posted By Lord of Bananas in November, 2023

Source: Bizrate

Overall Rating -> 10

It was easy to navigate and I hope that the gem is as nice as the picture

Posted By 1 in April, 2024

Source: Bizrate

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

Convenient selection, arrival on time

Posted By Alin in February, 2024

Source: Bizrate

Overall Rating -> 9

It was simple and clear to understand.

Posted By Thora007 in December, 2023

Source: Bizrate

Overall Rating -> 10

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.

Posted By Spinach in May, 2023

Source: Bizrate

Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

Posted By Orchidisle in February, 2024

Source: Bizrate

Gemstones A-Z

Buy Oval Shape 16x12 mm Gems

0.17 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.4 mm

3.77 carat Marquise Cut Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 9.3 x 4.3 mm

2.16 ct Round Labradorite, 8 mm From Madagascar

1.8 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 8.3 x 8.8 mm

3.6 ct Loose Trillion Concave Cut Mystic Quartz, 8.1 x 8.1 mm From Brazil

3.65 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 6.9 mm

1.71 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 6.1 mm

0.52 ct Loose Orange Sapphire, 4.3 x 4.2 mm Cushion Cut From Tanzania

1.72 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Gem, 8.8 x 7 mm

10.19 carat Carved Rose Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.7 x 13.6 mm

1.03 ct Octagon Cut Peridot, 7 x 5.1 mm From China

7.35 ct Oval Cut Strawberry Quartz, 14.4 x 11.1 mm From Russia

1.65 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 8.2 x 8.1 mm

6.96 ct Pink Morganite, 11.9 mm Round Cut From Afghanistan

2.34 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.9 x 5 mm

4.2 ct Round Strawberry Quartz, 8.6 mm From Russia

29.51 ct Oval Hematite, 22.5 x 16.9 mm From Brazil

4.15 ct Oval Nuummite, 12.9 x 7.3 mm From India

0.94 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.2 x 4.2 mm

0.97 carat Orange Moonstone, Pear Shape loose Moonstone from India, Natural Untreated Gem, 8.7 x 5.8 mm

1.91 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 7.1 mm

1.8 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.3 x 6.7 mm

38.17 ct Oval Coral, 33.9 x 22.3 mm From Mexico

2.44 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.2 x 7.7 mm

2.25 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 7.8 x 7.7 mm

0.5 ct Violet Spinel, 5.1 mm Round Cut From Tanzania

11.92 ct Oval Star Moonstone, 15.1 x 11.9 mm From India

10.01 ct Yellow Quartz, 8.3 x 8.2 mm Carved From Brazil

1.36 ct Oval Cut Peridot, 7.9 x 5.8 mm From China

7 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.2 x 7.4 mm

8.2 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 13.8 x 8.1 mm

21.62 ct Oval Jasper, 18 x 13 mm From Indonesia

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