Calibrated 9 x 7 mm Octagon / Emerald-Cut 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 9 x 7 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

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

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Overall Rating -> 10

No issues at all. It was great.

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Overall Rating -> 9

Well presented images, clear information, quick and easy check out.

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Overall Rating -> 10

Gem Select has gems at afffordable prices.

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Overall Rating -> 10

Easy to use as always and in all steps from opening site to paying.

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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

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Overall Rating -> 10

I have used Gem Select many times over the past 10 years and have always been happy with the product & services

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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.

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Overall Rating -> 10

Great site

Posted By Lord of Bananas in November, 2023

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Overall Rating -> 10

I was looking for ammolite for my husband. Other websites are not always clear about whether they have genuine ammolite or simulated ammolite. I have purchased from GemSelect before and trust that the stones are genuine. Finding the stones I want is easy, and I love all of the search filter options!

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Overall Rating -> 10

Excellent experience!

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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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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

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

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Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

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Gemstones A-Z

Buy Octagon Shape 9x7 mm Gems

1.99 carat Pear Tiger's Eye, loose Certified Tiger's Eye from Thailand, Natural Untreated Gem, 10.2 x 7.1 mm

4.54 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.2 x 4.2 mm

21.45 carat Bi-color Ametrine, Marquise-Cut loose Ametrine from Brazil, Natural Untreated Gem, 30.2 x 13.4 mm

2.35 carat Princess-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.1 x 8.1 mm

23.8 ct Oval Jasper, 28.1 x 16.5 mm From Mexico

0.51 carat Violet Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6.1 x 4.2 mm

8.5 ct Heart Rose Cut Onyx, 10.4 x 10.4 mm From Sri Lanka

2.05 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 9.9 x 5 mm

0.88 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5.1 mm

0.74 ct Octagon Cut Color-Change Diaspore, 6.1 x 4 mm From Turkey

0.63 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6.1 x 4.1 mm

1.8 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 6.1 mm

3.43 ct Oval Strawberry Quartz, 10.2 x 8.2 mm From Russia

12.09 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 18.1 x 13.1 mm

5.86 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15 x 10.2 mm

3.71 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 7.1 mm

3.68 carat Yellow Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gems, 6.8 x 5.4 mm

1.01 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 6.8 x 5.1 mm

167.02 carat Pear Shape Rose Quartz, loose Certified Rose Quartz from South Africa, Natural Untreated Gem, 46 x 29.3 mm

0.44 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 8.6 x 3.8 mm

5.03 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 8 x 5 mm

1.68 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 6.1 mm

14.69 ct Yellow Quartz, 20.1 x 15.2 mm Cushion Checkerboard From Brazil

1.31 ct Yellow Beryl, 8.3 x 6.2 mm Cushion Cut From Brazil

3.13 carat Sky Blue Topaz, Emerald Cut loose Topaz from Cambodia, Natural Gem, 8.2 x 8.2 mm

1.16 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 5.1 x 4.1 mm

0.94 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.2 x 4.7 mm

1.66 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.1 mm

0.48 carat Pink Morganite, Marquise-Cut loose Morganite from Afghanistan, Natural Untreated Gem, 8.5 x 3.9 mm

41.95 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 25.4 x 16.9 mm

2.86 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.1 x 9.9 mm

8.83 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 14 x 9.8 mm

Gemstone Information

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