Calibrated 10 x 8 mm Octagon Shape Natural Gemstones: 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 Octagon shape / Emerald-Cut, faceted and cabochon gems available now in 10 x 8 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.

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Overall Rating -> 10

this was very easy im exited to get my order

Posted By Mr. in April, 2024

Source: Bizrate

Overall Rating -> 10

Selection ability was straightforward and easy.

Posted By Dave in May, 2023

Source: Bizrate

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 -> 10

The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

Posted By AV in May, 2023

Source: Bizrate

Overall Rating -> 9

Good interaction with site

Posted By Brick in September, 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

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

Posted By Meow in June, 2023

Source: Bizrate

Overall Rating -> 10

I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

Posted By Oakcityceo in May, 2023

Source: Bizrate

Overall Rating -> 10

Love Gem select. great gems for the price. Can't beet them

Posted By Apps in September, 2023

Source: Bizrate

Overall Rating -> 10

Selection and purchasing online was very easy

Posted By Aggy in January, 2024

Source: Bizrate

Overall Rating -> 10

Love gemselect

Posted By Joshua Howard in March, 2024

Source: Bizrate

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

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

Source: Bizrate

Overall Rating -> 10

great. thank you

Posted By Carrotroller in July, 2023

Source: Bizrate

Overall Rating -> 10

Fine. All emails answered. Excellent service. Nice discount added for orders. Briefly, a very good experience.

Posted By C.J. in February, 2024

Source: Bizrate

Gemstones A-Z

Buy Octagon Shape 10x8 mm Gems

2.5 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 15.8 x 10.2 mm

2.54 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm

21.56 ct Octagon / Emerald Cut Bloodstone, 16 x 12.2 mm From Madagascar

0.49 ct Loose Orange Sapphire, 4.6 x 4.6 mm Heart Cut From Tanzania

2.01 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 7.8 x 7.8 mm

0.53 ct Loose Orange Sapphire, 4.8 x 3.9 mm Octagon Cut From Tanzania

0.65 ct Loose Purple Sapphire, 6.8 x 5.1 mm Oval Cut From Madagascar

7.1 ct Loose Baguette Labradorite, 9.2 x 7.1 mm From Madagascar

3.02 ct Oval Cut Golden Beryl, 9.2 x 6.7 mm From Madagascar

7.39 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 15.1 x 7 mm

5.09 ct Round Cut Smoky Quartz, 11.7 mm From Brazil

21.73 ct Yellow Quartz, 17.2 x 17.2 mm Asscher Cut From Brazil

1.43 ct Green Sphene, 7.5 x 5.7 mm Oval Cut From Sri Lanka

4.66 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.1 x 8 mm

2.12 ct Loose Pear Cut Mystic Quartz, 8.1 x 6.1 mm From Brazil

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

4.6 ct Rainbow Pyrite, 19.4 x 7.3 mm From Russia

0.89 ct Loose Round Cut Lapis Lazuli, 6 mm From Afghanistan

1.04 ct Oval Sillimanite Cat's Eye, 7 x 4.7 mm From Madagascar

4.28 carat Yellow Citrine, Briolette loose Citrine from Brazil, Natural Untreated Gem, 13.8 mm

17.89 ct Baguette Rose Cut Lapis Lazuli, 21.1 x 15.8 mm From Afghanistan

48.07 ct Oval Tiger's Eye Matrix, 37.2 x 23.5 mm From Mexico

29.17 ct Green Jadeite, 38.8 x 16 mm Carved From Myanmar

1.92 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.5 x 3.5 mm

1.31 ct Blue Kyanite, 7.2 x 5.2 mm Oval Cut From Nepal

0.97 ct Loose Princess Cut Sapphire, 2.3 x 2.3 mm From Tanzania

3.9 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6 x 4.1 mm

5.73 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gem, 12.2 x 10.1 mm

4.73 carat Swiss Blue Topaz, Round loose Topaz from Brazil, Natural Gems, 8.2 mm

0.5 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.1 x 4.2 mm

1.03 ct Blue Kyanite, 6.1 mm Round Cut From Nepal

13.37 ct Yellow Quartz, 16.2 x 16.2 mm Octagon Concave Cut From Brazil

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