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 -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

Source: Bizrate

Overall Rating -> 10

I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you

Posted By Sue in April, 2023

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Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

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Overall Rating -> 10

love yall

Posted By Rock hunter in August, 2023

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Overall Rating -> 9

Good interaction with site

Posted By Brick in September, 2023

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Overall Rating -> 10

I enjoyed browsing though different varieties of rubies. I felt that the experience was simple and easy to navigate!

Posted By Daws in July, 2023

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Overall Rating -> 10

Found what I was looking for

Posted By Rian in June, 2023

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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 -> 9

Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.

Posted By Bob in November, 2023

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Overall Rating -> 10

It was easy to navigate and I hope that the gem is as nice as the picture

Posted By 1 in April, 2024

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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 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 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

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Overall Rating -> 10

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

Source: Bizrate

Overall Rating -> 10

The site is very easy to use and I will continue to shop here. The quality is superb

Posted By Genia in January, 2024

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Gemstones A-Z

Buy Octagon Shape 8x6 mm Gems

1.27 ct Purple Spinel, 6.7 x 6.3 mm Cushion Cut From Tanzania

2.06 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 4.9 x 3.2 mm

0.84 ct Loose Yellow Sapphire, 5.1 mm Round Cut From Tanzania

2.32 ct Round Tiger's Eye, 7.9 mm From Thailand

15.13 ct Loose Oval Bloodstone, 17.8 x 14.6 mm From Madagascar

11.77 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 17.2 x 12.9 mm

1.17 carat Orange Sunstone, Oval loose Sunstone from India, Natural Untreated Gem, 8.2 x 6.4 mm

2.2 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.9 x 3.9 mm

7.21 carat Yellow Citrine, Emerald Cut loose Citrine from Bolivia, Natural Untreated Gem, 14 x 10 mm

2.4 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.1 x 7.1 mm

3.02 ct Red Andesine Labradorite, 8.3 x 6.2 mm Oval Cut From Congo

0.18 ct White Diamond, 2.9 mm Diamond Cut From India

31.29 ct Yellow Quartz, 22.6 x 19.5 mm Oval Concave Cut From Brazil

8.41 ct Odd Shaped Druzy Variscite, 22.5 x 14.2 mm From China

2.48 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.2 x 9.1 mm

17.67 ct Pink Kunzite, 15.4 x 11.4 mm Octagon Cut From Afghanistan

27.33 ct Cushion Checkerboard Nuummite, 36.9 x 21.9 mm From India

1.74 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gem, 8.1 mm

1.22 carat Green Sapphire, Round loose Sapphire from Tanzania, Natural Gems, 4.1 mm

1.37 carat Marquise Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12 x 6 mm

5.02 carat Trillion Mystic Quartz, loose Certified from Brazil, Natural Gems, 9.1 x 9.1 mm

0.52 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.3 x 4.2 mm

6.43 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 11.1 x 9 mm

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

2 ct Oval Prehnite, 7.7 x 6.8 mm From South Africa

5.16 ct Loose Oval Malachite, 12 x 10 mm From Congo

1.74 carat Yellow Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gems, 8.2 x 6 mm

2.69 ct Yellow Beryl, 11.2 x 8.7 mm Oval Cut From Brazil

2.99 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 9 x 6.8 mm

5.12 ct Asscher Cut Rose Quartz, 11.3 x 11.2 mm From South Africa

20.74 ct Square Hematite, 17.5 x 17.1 mm From Brazil

4.44 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 8.9 mm

Gemstone Information

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