Calibrated 10 x 8 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 10 x 8 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

the searching format was easy to find what i needed. It helped to be able to sort Lowest price to Highest because i wasnt looking to spend too much but i did want an actual stone and not imitation.

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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

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

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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.

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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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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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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.

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I have received emails for about a year and today is the condition that had me decide on the purchase

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Gemstones A-Z

Buy Octagon Shape 10x8 mm Gems

1.8 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.9 x 6 mm

27.41 carat Pear Coral, loose Certified Coral from Mexico, Natural Untreated Gem, 27.1 x 25.4 mm

9.84 ct Baguette Pietersite, 21.1 x 11.2 mm From Namibia

0.66 carat Green Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 15.8 x 2.8 mm

0.56 ct Loose Yellow Sapphire, 4.5 x 4.4 mm Square Cut From Tanzania

34.18 ct White Quartz, 27.9 x 24.8 mm Carved From Brazil

2.94 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.7 x 8.8 mm

1.12 ct Gray Moonstone, 5.1 mm Round Cut From India

4.15 ct Round Pietersite, 9.8 mm From Namibia

2.42 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 10 x 4.9 mm

0.82 ct Oval Peridot, 6.1 x 4.2 mm From China

1.57 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6.7 mm

1.98 ct Blue Apatite, 4.4 mm Round Cut From Madagascar

2.54 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.1 mm

15.91 ct Loose Pear Dendritic Agate, 18 x 13.2 mm From India

0.22 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.8 mm

1.41 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5.2 mm

0.58 carat Blue Sapphire, Diamond-Cut loose Sapphire from Madagascar, Natural Gem, 5 mm

43.39 carat Pear Shape Rose Quartz, loose Certified Rose Quartz from South Africa, Natural Untreated Gem, 30 x 20.2 mm

0.49 ct Loose Yellow Sapphire, 4 x 4 mm Square Cut From Tanzania

18.92 ct Baguette Jasper, 27.1 x 13 mm From Mexico

6.2 ct Yellow Quartz, 12 mm Round Concave Cut From Brazil

2.26 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

0.8 ct Loose White Sapphire, 4.5 mm Diamond Cut From Madagascar

30.57 ct Oval Jasper, 31.3 x 19.9 mm From Indonesia

1 ct Blue Kyanite, 7 x 5.3 mm Oval Cut From Nepal

75.1 ct Round Quartz With Marcasite, 22.5 mm From Brazil

1.96 ct Orange Sunstone, 8.4 mm Round Cut From India

1.98 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.6 x 6.4 mm

0.74 carat Green Sapphire, Trillion-Cut loose Sapphire from Madagascar, Natural Gem, 5.6 x 5.6 mm

23.68 ct Fancy Fossil Coral, 20.8 x 13.3 mm From Indonesia

2.36 carat Brown Tourmaline, Pear Shape loose Tourmaline from Mozambique, Natural Untreated Gem, 12.3 x 7.4 mm

Gemstone Information

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