Calibrated 7 x 5 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 7 x 5 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

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

Posted By Tim in April, 2024

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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

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

I have started a small gem brokerage. I find stones to meet clients needs. Gemselect has helped me find what people what.

Posted By Pirates Bounty in April, 2024

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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

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Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 2023

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Overall Rating -> 9

GemSelect has a fantastic assortment of Semi-precious stones. I have not found any other web site with the variety you have.

Posted By RobDill in August, 2023

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Overall Rating -> 10

love yall

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Overall Rating -> 9

It was simple and clear to understand.

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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.

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Overall Rating -> 10

My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

Posted By Spinach in May, 2023

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Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

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Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

Posted By GemGrammy in January, 2024

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Overall Rating -> 10

I purchase all of my stones from GemSelect! They're the best I've found for both selection and value.

Posted By Terry in June, 2023

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Gemstones A-Z

Buy Octagon Shape 7x5 mm Gems

5.52 ct Oval Cut Strawberry Quartz, 14.1 x 10 mm From Russia

5.04 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10 x 8 mm

4.04 ct Yellow Agate, 12.7 x 10.8 mm Oval Cut From India

9.2 ct Yellow Quartz, 16 x 14 mm Hexagon Cut From Brazil

13.73 ct Baguette Malachite, 13.1 x 11 mm From Congo

3.33 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 11.7 x 9.7 mm

1.36 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 5.9 x 5.7 mm

19.42 ct Oval Onyx, 25 x 18.1 mm From Sri Lanka

2.72 carat Swiss Blue Topaz, Briolette loose Topaz from Brazil, Natural Gem, 10.9 mm

1.98 carat Orange Zircon, Pear Shape loose Zircon from Cambodia, Natural Untreated Gem, 8.3 x 6.8 mm

1.43 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.8 x 5 mm

7.97 carat White Topaz, Square loose Topaz from Brazil, Natural Untreated Gems, 5.1 x 5.1 mm

4.2 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.8 x 7.8 mm

1.13 ct Yellow Sillimanite, 7.9 x 5.9 mm Oval Cut From Sri Lanka

14.61 ct Rainbow Pyrite, 21 x 13.4 mm From Russia

0.98 ct Loose Purple Spinel, 6.2 x 5.8 mm Cushion Cut From Tanzania

5.47 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13.9 x 10 mm

6.62 ct Baguette Tiger's Eye, 14.2 x 10.2 mm From Thailand

1.73 ct Yellow Apatite, 8.8 x 7.2 mm Oval Cut From Madagascar

4.65 ct Blue Green Grandidierite, 11.7 x 8.7 mm Oval Cut From Madagascar

1.67 ct Orange Morganite, 7.9 x 5.7 mm Oval Cut From Afghanistan

1.37 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gem, 7.1 x 6 mm

5.79 ct Pink Morganite, 12.9 x 10.1 mm Oval Cut From Afghanistan

1.4 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 19.9 x 3 mm

43.81 ct Oval Jasper, 34.6 x 25.5 mm From Indonesia

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

1.56 ct Purple Spinel, 6.9 x 6.4 mm Cushion Cut From Tanzania

0.87 carat Pink Malaya Garnet, Marquise Cut loose Malaya Garnet from Tanzania, Natural Untreated Gem, 8.7 x 4.6 mm

1.93 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 17.9 x 3.8 mm

0.9 ct Green Sphene, 5.5 mm Round Cut From Sri Lanka

0.94 ct Yellow Beryl, 7.3 x 7.1 mm Trillion Cut From Madagascar

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

Gemstone Information

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