Calibrated 5 x 3 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 5 x 3 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 have actually done business with them before and was quite satisfied with them then.My Mother collected turtle items and when I saw the Mother of Pearl turtle...I just thought of her and decided to buy it. It's even tinier than I thought, but so adorable!The gemstones I bought are for jewelry for my daughter's birthday.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

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Overall Rating -> 10

My overall interaction with your website was pleasant, as always.

Posted By RJ in April, 2024

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

Source: Bizrate

Overall Rating -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

Source: Bizrate

Overall Rating -> 10

I particularly like information about product provided with purchase.

Posted By Dick in May, 2023

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Overall Rating -> 10

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

Posted By MAGSMX in August, 2023

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Overall Rating -> 9

It was simple and clear to understand.

Posted By Thora007 in December, 2023

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

Source: Bizrate

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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Overall Rating -> 10

Convenient selection, arrival on time

Posted By Alin in February, 2024

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Overall Rating -> 10

first time here sooooooooooo we will seeeee!!!!! so far so good!!!!!!

Posted By Seastone 56 in October, 2023

Source: Bizrate

Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

Overall Rating -> 10

Great selection and excellent website.

Posted By JBW in October, 2023

Source: Bizrate

Gemstones A-Z

Buy Octagon Shape 5x3 mm Gems

2.72 ct Red Agate, 7.8 x 6.1 mm Oval Cut From India

5.03 ct Round Labradorite, 10.2 mm From Madagascar

4.56 ct Cushion Onyx, 11 x 10.9 mm From Sri Lanka

3.55 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gems, 5.9 x 4.9 mm

3.05 ct Oval Prehnite, 9 x 8.2 mm From South Africa

1.82 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8 mm

2.54 ct White Moonstone, 9.9 x 8.1 mm Oval Cut From India

2.69 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.2 x 6.2 mm

1.25 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 4.5 x 3.6 mm

2.95 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.5 mm

37.66 ct Oval Idocrase, 32.5 x 20.1 mm From the United States

1.92 ct Cushion Cut Peridot, 8.1 x 6.7 mm From Myanmar

1.08 ct Round Buff Top Strawberry Quartz, 7.1 mm From Russia

2.68 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.1 x 5.2 mm

1.69 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.2 mm

2.09 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 6.8 x 6.8 mm

6.54 carat Marquise Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18 x 9.4 mm

4.34 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.9 x 4.9 mm

4.71 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 16 x 8.1 mm

0.94 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 5.5 mm

1.91 ct Orange Sunstone, 8.6 mm Round Cut From India

2.34 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 8.9 mm

2.11 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 7.1 mm

94.12 ct Yellow Quartz, 37.4 x 25.2 mm Oval Portuguese Cut From Brazil

1.93 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gem, 8 x 6 mm

0.5 ct Loose White Sapphire, 4.5 mm Round Cut From Tanzania

1.37 carat Pear Shape Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.5 x 6.2 mm

3.02 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.9 x 7.8 mm

17.94 carat Pear Obsidian, loose Certified Obsidian from the United States, Natural Untreated Gem, 27.7 x 19.1 mm

1.48 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gems, 7.9 x 6.2 mm

1.37 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 10.1 x 7.9 mm

0.39 carat Blue Sapphire, Oval loose Sapphire from Tanzania, Natural Gem, 5 x 4 mm

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