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

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

Posted By ChiChi in January, 2024

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

Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

Source: Bizrate

Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

Source: Bizrate

Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 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

Source: Bizrate

Overall Rating -> 10

Purchasing from Gem Select was a pleasant and easy experience. The photos of the stones I was interested in were an accurate depiction of the stones I received. Ordering was easy and the items arrived within a week. Over all it was a very positive experience.

Posted By Dee in September, 2023

Source: Bizrate

Overall Rating -> 10

The website is very easy to use. The search function, filter and sort functions are very helpful.

Posted By Sboro in August, 2023

Source: Bizrate

Overall Rating -> 10

Website was incredibly easy and fast to use. Navigation and product outlay was simple and enjoyable to browse. Thank you and have a blessed day!

Posted By Devi in October, 2023

Source: Bizrate

Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

Source: Bizrate

Overall Rating -> 10

I have received emails for about a year and today is the condition that had me decide on the purchase

Posted By Tim in April, 2024

Source: Bizrate

Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

Source: Bizrate

Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 2023

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

Gemstones A-Z

Buy Octagon Shape 10x8 mm Gems

0.74 ct Loose White Sapphire, 4.5 mm Diamond Cut From Madagascar

4.89 ct Green Jadeite, 11 x 9.7 mm Oval Cut From Myanmar

0.5 carat Green Sapphire, Emerald-Cut loose Sapphire from Tanzania, Natural Gem, 5.1 x 3.2 mm

0.66 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.5 x 4.6 mm

26.09 carat Bi-color Fluorite, Pear Shape loose Fluorite from India, Natural Untreated Gem, 23.8 x 17.1 mm

0.24 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 5 x 3.1 mm

2.36 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9 x 7.4 mm

1.75 carat Oval Peridot, loose Certified Peridot from China, Natural Untreated Gems, 7.1 x 5.1 mm

6.72 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.9 x 9.8 mm

2.05 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12 x 5.9 mm

4.96 carat Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.2 x 10.5 mm

1.8 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 8.1 x 4.9 mm

1.37 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 10.1 x 7.9 mm

1.93 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gem, 7.1 mm

5.91 ct Oval Coral, 16.1 x 10.6 mm From Indonesia

0.7 ct Orange Sphalerite, 4.8 mm Round Cut From Spain

2.52 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 8.6 x 6.9 mm

3.05 ct Loose Orange Sapphire, 5.8 x 5 mm Oval Cut From Tanzania

6.86 ct Pear Chrysoprase, 14.5 x 10.9 mm From Madagascar

6.97 ct Trillion Pietersite, 16.4 x 14.8 mm From Namibia

10.49 carat Pink Kunzite, Pear Shape loose Kunzite from Afghanistan, Natural Untreated Gem, 16.6 x 11 mm

1.09 ct Purple Spinel, 6.4 x 5.5 mm Cushion Cut From Tanzania

0.2 ct Oval Chrysoberyl Cat's Eye, 3.4 x 3.3 mm From Sri Lanka

0.95 ct Octagon Cut Peridot, 7 x 5 mm From China

8.02 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 10.1 mm

30.17 ct Blue Aventurine, 34.3 x 10.8 mm Pencil Cut From Brazil

0.44 ct Octagon Cut Kornerupine, 4.6 x 3.8 mm From Sri Lanka

6.74 ct Loose Oval Cut Mystic Quartz, 11.1 x 9 mm From Brazil

18.31 ct Yellow Quartz, 18.2 x 18.1 mm Octagon Concave Cut From Brazil

46.75 ct Oval Opal in Matrix, 38.3 x 25.5 mm From Honduras

11.57 carat Pink Topaz, Oval loose Topaz from Brazil, Natural Gems, 12.1 x 10 mm

26.33 ct Brown Moonstone, 22.2 x 16 mm Oval Cut From India

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