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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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.

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

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Gemstones A-Z

Buy Octagon Shape 10x8 mm Gems

7.58 ct Brown Apatite, 12.2 x 12.2 mm Cushion Cut From Madagascar

4.2 carat London Blue Topaz, Heart loose Topaz from Brazil, Natural Gem, 9.5 x 9.3 mm

5.61 ct Yellow Quartz, 14.4 x 10.7 mm Carved From Brazil

4.79 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gem, 11.3 x 9.2 mm

4.79 carat Sky Blue Topaz, Round loose Topaz from Brazil, Natural Gems, 8.3 mm

26.99 carat Pear Obsidian, loose Certified Obsidian from the United States, Natural Untreated Gem, 24 x 23.9 mm

1.28 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 6.9 x 5.8 mm

2.9 ct Yellow Sphene, 9.3 x 7.7 mm Oval Cut From Sri Lanka

4.89 ct Green Jadeite, 11 x 9.7 mm Oval Cut From Myanmar

2.21 carat Sky Blue Topaz, loose Topaz from Brazil, Natural Gems, 7.2 x 5.2 mm

16.07 ct Oval Rainbow Moonstone, 21.4 x 14.6 mm From the United States

1.36 ct Loose Orange Moonstone, 8.1 x 7.9 mm Trillion Cut From India

19.04 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 18.1 x 15.2 mm

1.51 ct Blue Star Sapphire, 7.1 x 5.2 mm Oval Cut From Thailand

2.73 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6.1 x 4.2 mm

5.92 ct Pink Kunzite, 13.1 x 8 mm Cushion Cut From Afghanistan

3.2 ct Oval Cat's Eye Scapolite, 10.6 x 7.5 mm From Madagascar

0.69 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 5.2 mm

0.92 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6 x 4 mm

0.67 ct Pink Spinel, 5.3 x 4.9 mm Cushion Cut From Tanzania

5.92 ct Loose Baguette Labradorite, 9 x 7.1 mm From Madagascar

0.28 ct Oval Cut Kornerupine, 4.5 x 3.6 mm From Sri Lanka

28.06 ct Octagon / Emerald Cut Lapis Lazuli, 25.6 x 14.9 mm From Afghanistan

2.76 carat Round Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 2.5 mm

2.12 ct Loose White Sapphire, 2.4 x 2.4 mm Princess Cut From Madagascar

1.42 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 6.1 x 6 mm

5.2 ct Round Cut Golden Beryl, 9.1 mm From Madagascar

1.82 ct Round Cut Strawberry Quartz, 8.1 mm From Russia

1.47 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gems, 7 x 5.1 mm

0.39 carat Orange Spessartite Garnet, Pear Shape loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 5.1 x 3.9 mm

3.02 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 7.8 x 6.4 mm

7.22 carat Blue Green Fluorite, Oval loose Fluorite from India, Natural Untreated Gem, 12.4 x 10.1 mm

Gemstone Information

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