Calibrated 12 mm Round Shape Loose Natural Gemstones from GemSelect

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Round Shape 12 mm Gems
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.

Certified Customer Reviews

Overall Rating -> 9

Easy to shop through gemselect and will look there for future purchases.

Posted By Childcapo in February, 2019

Source: Bizrate

Overall Rating -> 10

good value

Posted By Don in February, 2019

Source: Bizrate

Overall Rating -> 10

It was super easy to browse all the gemstones and find exactly what you wanted. The prices were great and the checkout process was smooth. Seems like a great site, will definitely come back to find more in the future.

Posted By JMWatch Guy in February, 2019

Source: Bizrate

Overall Rating -> 9

Ive always been pleased with quality and truth of gems rating I am a gemmologist and really like the descriptions as well . i.e cut, colour and quality Sometimes Ill choose GemSelect rather than a local wholesaler because of my regard for their quality and truth

Posted By Mango in February, 2019

Source: Bizrate

Overall Rating -> 9

I will continue to utilize gemselect in my business as a jeweler.

Posted By Julie in February, 2019

Source: Bizrate

Overall Rating -> 10

Very good selection, easy to navigate site and very reasonable prices. I look forward to receiving the gems and if they are everything they appeared to be I will be extremely happy. Definitely likely to purchase from this site again.

Posted By Anthony in January, 2019

Source: Bizrate

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Seller Trust

Buy Round Shape 12 mm Gems

Round Brown Smoky Quartz

Sphere / Ball Gray Pearl

Round Gray Star Sapphire

Round Red Strawberry Quartz

Round Green Prehnite

Round White Quartz Cat's Eye

Round Blue Larimar

Round White Quartz Cat's Eye

Round Green Maw-Sit-Sit

Sphere / Ball Gray Pearl

Round Green Jadeite

Sphere / Ball Yellow Pearl

Sphere / Ball Gray Pearl

Round Blue Topaz

Round Green Jadeite

Sphere / Ball Gray Pearl

Round Green Jadeite

Round White Quartz Cat's Eye

Round Green Jadeite

Round Black Spinel

Round Brown Cat's Eye Scapolite