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 -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

Source: Bizrate

Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

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Overall Rating -> 8

I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.

Posted By Mark in March, 2024

Source: Bizrate

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

Very detailed and great pictures

Posted By Alexandrite in November, 2023

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

Posted By Happiness in January, 2024

Source: Bizrate

Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 2023

Source: Bizrate

Overall Rating -> 10

I love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

Posted By Cahall in March, 2024

Source: Bizrate

Overall Rating -> 10

Great selection and excellent website.

Posted By JBW in October, 2023

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Overall Rating -> 10

Easy to use,I have spent many hours looking at the site

Posted By Skip in November, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

Posted By Jf in January, 2024

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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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Gemstones A-Z

Buy Square Shape 12x12 mm Gems

4.63 ct Loose Oval Cut Strawberry Quartz, 12.1 x 10.1 mm From India

3.78 ct Yellow Sphene, 7.3 x 6.7 mm Oval Cut From Sri Lanka

4.83 ct Orange Sunstone, 10 x 8.2 mm Oval Cut From India

7.3 carat Bi-color Ametrine, Oval loose Ametrine from Brazil, Natural Untreated Gem, 13.9 x 11.2 mm

2.77 ct Round Strawberry Quartz, 8.1 mm From Russia

2.6 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.1 x 3.2 mm

12.66 ct Oval Pietersite, 23.4 x 14 mm From Namibia

1.54 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.9 x 4.4 mm

1.45 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5.1 mm

1.18 ct Oval Sillimanite Cat's Eye, 7.7 x 5.6 mm From Madagascar

2.04 carat Brown Zircon, Oval loose Zircon from Tanzania, Natural Untreated Gem, 8.2 x 6.2 mm

0.62 ct Loose Violet Sapphire, 6.5 x 4.4 mm Oval Cut From Tanzania

3.51 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 3.9 mm

14.14 ct Carved Ruby-Zoisite, 14.5 x 14 mm From Tanzania

48.08 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 40.1 x 27.1 mm

4.49 ct Round Cut Strawberry Quartz, 11 mm From Russia

41.14 ct Odd Shaped Druzy Citrine, 26.6 x 19.1 mm From Uruguay

4.25 ct Pink Morganite, 8.1 mm Round Cut From Afghanistan

8.14 carat Green Opal, Oval loose Opal from Brazil, Natural Untreated Gem, 16.6 x 14.3 mm

1.5 ct Yellow Beryl, 8.3 x 8.1 mm Trillion Cut From Brazil

5.29 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.8 x 10.3 mm

0.6 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6.1 x 4 mm

0.99 ct Blue Kyanite, 6.9 x 4.9 mm Oval Cut From Nepal

6.44 ct Marquise Slice Ruby in Fuchsite, 13.5 x 6.7 mm From Ethiopia

0.83 ct Octagon Cut Smoky Quartz, 9.7 x 4 mm From Brazil

0.78 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.2 x 5.1 mm

3.44 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 7.1 mm

1.39 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gem, 7.4 x 6 mm

2.3 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 9.9 x 5.1 mm

1.22 carat Pear Shape Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 12.8 x 4.4 mm

29.98 ct Oval Checkerboard Labradorite, 33.2 x 19.9 mm From Madagascar

6.4 ct Loose Oval Agate, 12.4 x 11 mm From Indonesia

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