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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I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

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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.

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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.

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Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

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LOVE YOU GUYS. YOU CARRY EVERY GEMSTON I WANT. THE PRICE IS GREAT,THE PRODUCT IS OUTSTANDING,AND THE SERVICE CANT BE BEET.

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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!

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Overall Rating -> 10

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Overall Rating -> 10

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Gemstones A-Z

Buy Oval Shape 16x12 mm Gems

0.48 carat Green Sapphire, Heart loose Sapphire from Tanzania, Natural Gem, 4.7 x 4.5 mm

3.65 carat Carved Cameo Mother of Pearl, loose Certified Mother of Pearl from China, Natural Untreated Gem, 19.1 x 12.4 mm

9.73 ct Oval Jasper, 18.1 x 13.2 mm From Indonesia

1.2 ct Blue Kyanite, 7.1 x 5 mm Oval Cut From Nepal

14.94 ct Oval Agate, 16.5 x 13.6 mm From Indonesia

53.78 ct Odd Shaped Charoite, 40 x 26.9 mm From Russia

3.26 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 14.2 x 10.3 mm

2.33 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.8 x 7.3 mm

0.45 ct Loose Pink Sapphire, 5.3 x 4.1 mm Oval Cut From Madagascar

2 carat Round Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 2.1 mm

14.15 ct Fancy Boulder Opal, 17.9 x 14.9 mm From Australia

1.72 ct Pink Kunzite, 7.3 x 5.9 mm Odd Shaped From Afghanistan

1.7 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.6 x 6.6 mm

0.74 carat Round Sapphire, loose Certified Sapphire from Tanzania, Natural Gems, 3.9 mm

2.16 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.1 x 9 mm

0.22 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 5.1 x 3 mm

0.88 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.2 x 4.1 mm

3.26 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 11.4 x 8.6 mm

0.49 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gem, 4.1 mm

1.71 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 4.1 x 4.1 mm

0.95 carat Orange Hessonite Garnet, Pear Shape loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 5.6 mm

0.94 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 9.7 x 5.7 mm

1.82 ct Blue Star Sapphire, 8 x 6 mm Oval Cut From Thailand

4.89 carat Trillion Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 5.1 x 5 mm

2.03 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.6 x 7.2 mm

12.97 ct Yellow Quartz, 15.9 x 15.3 mm Carved From Brazil

2.25 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.9 x 6.4 mm

1.72 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8 x 6 mm

1.41 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.4 x 6.2 mm

0.76 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6 x 6 mm

26.19 ct Fancy Jasper, 22.5 x 15.1 mm From Indonesia

1.25 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.7 x 4.9 mm

Gemstone Information

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