Buy 12 mm Round Calibrated Gemstones from 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 Round shapes, facet cut and cabochon gems available now in 12 mm diameter 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 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

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

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

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Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

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Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

Posted By Jrplunk in April, 2024

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Overall Rating -> 10

Excellent site.

Posted By Boru in December, 2023

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Overall Rating -> 9

GemSelect has a fantastic assortment of Semi-precious stones. I have not found any other web site with the variety you have.

Posted By RobDill in August, 2023

Source: Bizrate

Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie 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

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

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 -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 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

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Overall Rating -> 9

Good interaction with site

Posted By Brick in September, 2023

Source: Bizrate

Overall Rating -> 9

The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

Posted By Kasper in June, 2023

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Gemstones A-Z

Buy Round Shape 12 mm Gems

30.69 ct Carved Ruby-Zoisite, 25.5 x 18.4 mm From Tanzania

1.92 ct Oval Sillimanite Cat's Eye, 8.2 x 5.5 mm From Madagascar

0.84 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 5 x 4 mm

1.65 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5 mm

1.67 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gem, 7 mm

0.83 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.4 x 3.7 mm

4.91 ct White Moonstone, 8.1 mm Round Cut From India

1.31 ct Orange Moonstone, 6.2 x 6.2 mm Square Cut From India

15.42 ct Pink Morganite, 14 x 12.1 mm Oval Cut From Afghanistan

2.47 carat Blue Sapphire, Princess-Cut loose Sapphire from Sri Lanka, Natural Gems, 2.2 x 2.2 mm

0.63 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 7 x 5.1 mm

26.75 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 20.1 mm

9.24 ct Yellow Quartz, 13.2 x 13.2 mm Asscher Cut From Brazil

28.32 ct Cushion Coral, 25.3 x 20.3 mm From Mexico

0.47 carat Blue Sapphire, Octagon / Scissor Cut loose Sapphire from Tanzania, Natural Gem, 5.1 x 3.9 mm

41.89 ct Fancy Dendritic Agate, 40 x 21.2 mm From India

7.52 ct Carved Prehnite, 18.3 x 11.4 mm From South Africa

0.34 ct Orange Sphalerite, 3.9 mm Round Cut From Spain

4.52 carat Sky Blue Zircon, Round loose Zircon from Cambodia, Natural Gem, 8.3 mm

1.48 carat Pear Shape Rainbow Moonstone, loose Certified Rainbow Moonstone from India, Natural Untreated Gems, 5.2 x 5.1 mm

23.94 ct Cushion Fossil Coral, 18.5 x 14.1 mm From Indonesia

1.63 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 10.9 x 7.9 mm

0.83 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 5.9 x 4 mm

0.39 ct Purple Spinel, 6.7 x 3.5 mm Marquise Cut From Tanzania

1.3 ct Oval Cut Fire Opal, 9.9 x 6.9 mm From Mexico

8.2 ct Asscher Cut Rose Quartz, 12.5 x 12.5 mm From South Africa

3.89 ct Asscher Cut Rose Quartz, 9.7 x 9.6 mm From South Africa

21.45 ct Black Spinel, 18.2 x 12 mm Barrel Cut From Thailand

1.27 carat Marquise Cut Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 15 x 5.4 mm

44.46 ct Oval Idocrase, 35.6 x 20.4 mm From the United States

4.07 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4 mm

0.5 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.8 x 4.1 mm

Gemstone Information

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WHO ARE WE?

Gemstone EDUCATION

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