Calibrated 12 x 12 mm Square Shape Loose Natural Gemstones from Ge...

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 Square shapes, facet cut and cabochon gems available now in 12 mm 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 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 -> 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 The only "bad" thing that I have to say is that the interface of the site is outdated.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

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 10

The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

Posted By AV in May, 2023

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

Great experience! First time buyer

Posted By Todi89 in February, 2024

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Overall Rating -> 10

Easy to navigate

Posted By G Funk in December, 2023

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Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

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Overall Rating -> 10

Hello: You do have good website. Vast majority of folks would buy the Gems for its spiritual, physical / energy level, emotional level positive aspects. You have only very brief mention of this aspect of each Gem ..may be you can add little bit more about ways to leverage the beneificial effect of each gems i.e. some practical tips.ThanksRupen Patel

Posted By EarthDeep in February, 2024

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Overall Rating -> 9

Good interaction with site

Posted By Brick in September, 2023

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

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Overall Rating -> 10

I’ve enjoyed purchasing stones from this site. It’s convenient and fairly priced.

Posted By Chico in May, 2023

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Overall Rating -> 10

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

Posted By John in February, 2024

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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

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

Posted By Seastone 56 in October, 2023

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Overall Rating -> 10

I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

Posted By JamesMichael781 in September, 2023

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Gemstones A-Z

Buy Square Shape 12x12 mm Gems

14.81 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 24.5 x 14.1 mm

1.73 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gem, 8.1 mm

33.02 carat Pear Obsidian, loose Certified Obsidian from Mexico, Natural Untreated Gem, 29.5 x 21.2 mm

0.26 ct Orange Sphalerite, 3.6 mm Round Cut From Spain

5.61 ct Oval Cut Strawberry Quartz, 14 x 9.9 mm From Russia

24.65 carat Green Aventurine, Pear loose Aventurine from Brazil, Natural Untreated Gem, 32.5 x 21.5 mm

5.36 ct Asscher Cut Rose Quartz, 11.6 x 11.2 mm From South Africa

4.3 ct Brown Moonstone, 7.7 x 7.4 mm Carved From India

11.25 ct Oval Lapis Lazuli, 16.7 x 11.8 mm From Afghanistan

0.69 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 5.9 x 4.1 mm

6 ct Asscher Cut Rose Quartz, 9.2 x 9.1 mm From South Africa

1.37 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

30.88 ct Pencil Cut Strawberry Quartz, 33.1 x 11 mm From Russia

5.09 ct Oval Strawberry Quartz, 11 x 9.2 mm From Russia

0.18 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.5 mm

1.36 ct Purple Spinel, 6.5 x 5.8 mm Cushion Cut From Tanzania

1.42 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.7 x 3.4 mm

15.85 ct Oval Larimar, 20.1 x 15.2 mm From the Dominican Republic

0.39 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.8 x 4.8 mm

0.94 ct Pink Morganite, 7.2 x 5.6 mm Oval Cut From Afghanistan

4.68 ct Yellow Agate, 12.3 x 9.9 mm Oval Cut From India

27.23 ct Oval Serpentine, 25.9 x 15.7 mm From the United States

2.79 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10 x 7.2 mm

145.85 ct Yellow Quartz, 36.9 x 30.3 mm Oval Portuguese Cut From Brazil

5.49 ct Green Jadeite, 12.6 x 10.3 mm Oval Cut From Myanmar

7.57 ct Asscher Cut Rose Quartz, 12.2 x 12.2 mm From South Africa

0.83 ct Loose Purple Sapphire, 6.5 x 5.2 mm Oval Cut From Madagascar

2.26 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gem, 7.3 mm

0.77 carat Pear Shape Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 10.4 x 4.5 mm

3.53 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 5 mm

1.8 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5 x 5 mm

11.84 ct Round Cut Smoky Quartz, 15.8 mm From Brazil

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