Calibrated 12 x 10 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 12 x 10 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

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

Posted By John in February, 2024

Source: Bizrate

Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 2023

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Overall Rating -> 10

Interested in unusual stones and found many that I purchased or will purchase in the near future. I have been a customer of gem select for almost ten years and have always been pleased with buying experience and the delivered product

Posted By Fairhope Pete in December, 2023

Source: Bizrate

Overall Rating -> 10

Love the variety of stones, sizes and the prices

Posted By Dorita in March, 2024

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Overall Rating -> 9

Overall good, shipping prices just seem a little on the high side.

Posted By Steve in August, 2023

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Overall Rating -> 9

My first purchase went well. I will purchase more gems in the future.

Posted By NoHalalAl in March, 2024

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

Overall Rating -> 10

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

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Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 10

Extremely easy to use, and I am fully satisfied with the purchase process.

Posted By Fl_Beachcomber in October, 2023

Source: Bizrate

Overall Rating -> 10

My only complaint is that there are so many beautiful and affordable stones that I get distracted from what I planned to order.

Posted By Phoenix in March, 2024

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

Source: Bizrate

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 -> 10

Very good customer service. I had an issue on my end with shipping and I received a response the next day!

Posted By Orphanboy in December, 2023

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Overall Rating -> 10

I particularly like information about product provided with purchase.

Posted By Dick in May, 2023

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Gemstones A-Z

Buy Oval Shape 12x10 mm Gems

5.27 ct Loose Oval Cut Black Opal, 16.3 x 12.2 mm From Ethiopia

0.99 ct Orange Sphalerite, 5.7 mm Round Cut From Spain

5.72 ct Flower Cut Smoky Quartz, 11.4 x 11.1 mm From Brazil

4.65 carat Oval Strawberry Quartz, loose Certified from India, Natural Untreated Gem, 12.1 x 10 mm

1.22 ct Yellow Sphalerite, 6.2 mm Round Cut From Spain

5.61 carat Black Tourmaline, Oval loose Tourmaline from Tanzania, Natural Untreated Gem, 11.6 x 10 mm

2.13 ct Cushion Cut Peridot, 8.2 x 6.6 mm From Myanmar

1.51 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gems, 6.8 x 4.9 mm

12.01 ct Round Maw-Sit-Sit, 13.7 mm From Myanmar

10.52 ct Oval Tiger's Eye, 18.3 x 13.5 mm From India

1.5 carat Oval Peridot, loose Certified from China, Natural Untreated Gems, 7.1 x 5 mm

13.83 ct Oval Rose Quartz, 17.2 x 14.2 mm From South Africa

2.03 ct Black Star Sapphire, 8.7 x 6.6 mm Oval Cut From Thailand

2.81 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 10 mm

1.92 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 10.2 x 8 mm

1.1 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 5.8 mm

0.57 ct Oval Cut Color-Change Diaspore, 6.2 x 4.2 mm From Brazil

2.48 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 9 mm

2.5 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.2 x 4.2 mm

6.05 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 14.8 x 10.9 mm

2.6 carat Blue Green Fluorite, Oval loose Fluorite from India, Natural Untreated Gem, 8.5 x 6.9 mm

2.08 ct Yellow Sphene, 7.4 x 7.2 mm Oval Cut From Sri Lanka

0.83 ct Loose Purple Sapphire, 6.4 x 4.7 mm Oval Cut From Madagascar

11.17 ct Oval Rainbow Moonstone, 17.2 x 11.7 mm From the United States

3.74 carat White Topaz, Square loose Topaz from Brazil, Natural Untreated Gems, 4.1 x 4.1 mm

1.35 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 6.8 x 5.5 mm

3.53 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6.1 x 4.1 mm

2.5 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 6.2 mm

2.74 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9.2 x 7.7 mm

0.78 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.5 x 5.5 mm

2.97 ct Multicolor Mystic Quartz, 10.1 x 10 mm Trillion Concave Cut From Brazil

0.66 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6 x 4.1 mm

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