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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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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Overall Rating -> 10

I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

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Overall Rating -> 8

I am currently pleased. I like the layout of the website.

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Overall Rating -> 10

Todo muy bien en la compra ahora esperar recibir el pedido.

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Overall Rating -> 10

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

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Overall Rating -> 10

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

Posted By Pete in February, 2024

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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

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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

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

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Overall Rating -> 10

The website is user friendly, has excellent selection. I've always found what I was looking for with Gem Select. When others don't have it they do. And most important, they have a way for you to pay without using PayPal. I cannot use PayPal they closed my account because of no cell phone.

Posted By NJD in September, 2023

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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.

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Overall Rating -> 10

love yall

Posted By Rock hunter in August, 2023

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Overall Rating -> 10

Hello: You do have good website. Vast majority of folks would buy the Gems for its spiritual, physical / energy level, emotional level positive aspects. You have only very brief mention of this aspect of each Gem ..may be you can add little bit more about ways to leverage the beneificial effect of each gems i.e. some practical tips.ThanksRupen Patel

Posted By EarthDeep in February, 2024

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Overall Rating -> 10

Always an easy experience using Gem select.

Posted By Jeff in November, 2023

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Overall Rating -> 10

Best place to buy gem stones, dont bother shopping else where. Prices are great, no issues with shipping and customer service is the best.

Posted By J in December, 2023

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Gemstones A-Z

Buy Octagon Shape 8x6 mm Gems

4.24 carat Swiss Blue Topaz, Fancy-Cut loose Topaz from Brazil, Natural Gems, 7.2 x 5 mm

13.31 ct Yellow Quartz, 15.9 x 15.9 mm Octagon Concave Cut From Brazil

2.43 carat Red Zircon, Oval loose Zircon from Tanzania, Natural Untreated Gem, 8.1 x 6.2 mm

40.15 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 34.6 x 31.2 mm

3.76 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10.1 x 8.1 mm

2.01 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.2 mm

3.11 carat Orange Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.8 x 5.1 mm

8.86 ct Carved Prehnite, 15.9 x 11.2 mm From South Africa

5.69 ct Pink Morganite, 12 mm Round Cut From Afghanistan

4.46 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 8.2 x 6.2 mm

8.85 ct Oval Tiger's Eye, 16.1 x 11.9 mm From Thailand

2.25 ct Loose Trillion Concave Cut Mystic Quartz, 7.1 x 7 mm From Brazil

1.94 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.3 x 8.5 mm

0.48 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 6 x 4.1 mm

9.42 ct Yellow Apatite, 12.2 x 12.1 mm Asscher Cut From Madagascar

3.95 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.5 x 8.7 mm

10.17 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 13.7 x 9.9 mm

1.07 ct Yellow Beryl, 7.9 x 6.1 mm Oval Cut From Madagascar

4.6 ct Oval Actinolite Cat's Eye, 12.3 x 10.3 mm From the United States

1.88 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.8 x 6 mm

0.96 carat Green Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6.1 mm

1.89 ct Pink Morganite, 8 x 6 mm Oval Cut From Afghanistan

6.23 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.8 x 10 mm

1.63 carat Blue Sapphire, Baguette Step Cut loose Sapphire from Madagascar, Natural Gems, 5.1 x 3.1 mm

51.94 ct Oval Pyrite, 34.8 x 19.4 mm From Russia

38.3 ct Tapered Baguette Checkerboard Moss Agate, 26.6 x 21.4 mm From India

1.91 ct Oval Cat's Eye Opal, 10.7 x 6.7 mm From Madagascar

5.15 ct Pink Kunzite, 10.9 x 7.9 mm Octagon Cut From Afghanistan

6.03 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15 x 10.8 mm

1.05 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.1 x 7.1 mm

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

1.16 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 6 x 3.1 mm

Gemstone Information

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