Calibrated 18 x 13 mm Octagon Shape Natural Gemstones: GemSelect

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Octagon Shape 18x13 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 Octagon shape / Emerald-Cut, faceted and cabochon gems available now in 18 x 13 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.

Certified Customer Reviews

Overall Rating -> 10

I love that I was able to find a site that offers REAL gemstones. I love the pictures provided of the gems so I can look at each one from different angles, I love the variety of gems on the site & I love the ability to narrow down my search to look at certain gems that fit my criteria.

Posted By Risuna in January, 2019

Source: Bizrate

Overall Rating -> 10

Always a pleasure to do business with you. Gems have always been as pictured, certificate option is appreciated.

Posted By Lawrencekramer in January, 2019

Source: Bizrate

Overall Rating -> 10

My experience with gemselect was awesome so far. I had a few questions about their website and making orders and they replied quickly and were happy to help. I have not received the items I ordered yet as I just ordered them this morning. Although, I truly feel I am going to be a very happy customer once I do receive my items. Gemselect guarantees all their items and have a great return policy just incase. The have a vast selection of all kinds of stones and not to mention their prices are much better than some other websites. Thanks Gemselect I’ll be doing business here from now on!

Posted By Jpapaleo in January, 2019

Source: Bizrate

Overall Rating -> 10

I was very happy on the quality of the gemstones I recieved from GemSelect, I will deffinetly buy again.

Posted By Mckeg in January, 2019

Source: Bizrate

Overall Rating -> 10

Great, easy to use, efficient!

Posted By Olive in January, 2019

Source: Bizrate

Overall Rating -> 9

Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.

Posted By Dirk in January, 2019

Source: Bizrate

Gemstone Information

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