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

man their gems are pretty good, and the prices aren't to bad either, I like checking out hte gems on there website, beceause the pictures of the gems are taken pretty well, and you can see the table, and the facets.

Posted By Spinach in March, 2019

Source: Bizrate

Overall Rating -> 10

I love gemselect and I have bought a fair amount from them. The only complaint I have is not being able to save gems. I have a lot of projects so i am in the market for a lot of different gems and it's so disappointing to have to delete them all just to purchase one or two that I have saved in my cart.

Posted By S.Hicks in March, 2019

Source: Bizrate

Overall Rating -> 10

I always check this site because they have unique options.

Posted By Lisa in February, 2019

Source: Bizrate

Overall Rating -> 10

Great website to navigate. Awesome Gem selection! Nice photos and discriptions for all of the gems for sale. You can find gems in all price ranges. Checkout was a breeze.

Posted By Timmy in February, 2019

Source: Bizrate

Overall Rating -> 10

They had an extensive gemstone selection in all different cuts, sizes, and colors. They also had very good and workable prices. All of these aspects pulled me in as a customer.

Posted By Josh in February, 2019

Source: Bizrate

Overall Rating -> 9

It all depend on the product I will receive and have it verified by my in law jewellers.

Posted By Vodka in February, 2019

Source: Bizrate

Gemstone Information

Popular Gemstones

Seller Trust

Buy Octagon Shape 18x13 mm Gems

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Apatite

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Quartz

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine

Octagon / Emerald Cut Yellow Citrine