Calibrated 8 x 6 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 8 x 6 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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Gemstone Information

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Overall Rating -> 10

My only complaint is that there are so many beautiful and affordable stones that I get distracted from what I planned to order.

Posted By Phoenix in March, 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

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

Posted By Apps in September, 2023

Source: Bizrate

Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

Posted By Jrplunk in April, 2024

Source: Bizrate

Overall Rating -> 10

Very large selection of items and we used the stones to have several pieces of jewelry made for us.

Posted By Joe in January, 2024

Source: Bizrate

Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 2023

Source: Bizrate

Overall Rating -> 10

I love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

Posted By Cahall in March, 2024

Source: Bizrate

Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

Posted By Jf in January, 2024

Source: Bizrate

Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

Overall Rating -> 10

The website design is a bit finicky for mobile, but Im sure its most likely just a mobile issue. Amazing selection of products, great prices.

Posted By Kuba in December, 2023

Source: Bizrate

Overall Rating -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

Source: Bizrate

Overall Rating -> 10

The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

Posted By T-bone in October, 2023

Source: Bizrate

Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 2023

Source: Bizrate

Overall Rating -> 10

love yall

Posted By Rock hunter in August, 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

Gemstones A-Z

Buy Octagon Shape 8x6 mm Gems

1.85 ct Orange Moonstone, 7 x 7 mm Cushion Cut From India

0.9 ct Loose Round Cut Lapis Lazuli, 6.1 mm From Afghanistan

8.55 ct Loose Pear Dendritic Agate, 18.2 x 13.3 mm From India

9.61 ct Round Cut Smoky Quartz, 14.6 mm From Brazil

6.44 ct Yellow Quartz, 14.2 x 10.1 mm Carved From Brazil

11.66 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 21.1 x 13.8 mm

7.58 ct Green Agate, 13 x 11.3 mm Oval Cut From India

0.49 ct Orange Sphalerite, 4.8 x 4.6 mm Trillion Cut From Spain

0.87 ct Marquise Cut Peridot, 8.1 x 3.7 mm From China

3.34 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gem, 10.1 x 7.9 mm

2.71 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5 x 4.9 mm

3.47 ct Orange Sunstone, 11.1 x 8.9 mm Oval Cut From India

10.78 ct Cushion Rutile Quartz, 23.9 x 11.2 mm From India

3.65 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 10.8 x 8.9 mm

1.47 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gems, 7 x 5 mm

4.06 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 4.8 mm

32.06 ct Loose Green Amazonite, 40.5 x 10.5 mm Pencil Cut From Madagascar

3.18 carat Green Fluorite, Oval loose Fluorite from India, Natural Untreated Gem, 9.3 x 8.1 mm

1.27 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 8.5 x 6 mm

11.54 carat Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15.1 x 15 mm

0.94 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 9.9 x 6.4 mm

3.42 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 8.9 mm

0.66 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gem, 5.1 x 5.1 mm

2.91 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 6.1 x 6 mm

36.64 ct Pencil Cut Obsidian, 42.8 x 10.3 mm From the United States

0.44 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gem, 4.3 mm

0.41 ct Loose Yellow Sapphire, 5.1 x 3.1 mm Octagon Cut From Tanzania

1.02 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 7.3 x 7.2 mm

24.97 ct Carved Ruby-Zoisite, 19.3 x 18.3 mm From Tanzania

22.41 ct Pencil Cut Tiger's Eye, 29.8 x 9.7 mm From Thailand

1.45 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 8 x 6.1 mm

4.24 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.1 x 10 mm

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