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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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.

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LOVE YOU GUYS. YOU CARRY EVERY GEMSTON I WANT. THE PRICE IS GREAT,THE PRODUCT IS OUTSTANDING,AND THE SERVICE CANT BE BEET.

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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.

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The website design is a bit finicky for mobile, but Im sure its most likely just a mobile issue. Amazing selection of products, great prices.

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The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

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Easy to find the stones I was looking for. Always good quality stones

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Easy to use. Limited supply of higher quality gemstones.

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Perfect size I was looking for and great price

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Gemstones A-Z

Buy Octagon Shape 5x3 mm Gems

0.8 carat London Blue Topaz, Square loose Topaz from Brazil, Natural Gem, 4.9 x 4.8 mm

0.95 ct Oval Cut Peridot, 7 x 5.1 mm From China

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

39.99 ct White Jadeite, 27.5 x 21.7 mm Carved From Myanmar

33.26 ct Loose Pencil Cut Jasper, 34 x 11.6 mm From Indonesia

4.59 ct Oval Black Opal, 16.8 x 12.7 mm From Ethiopia

0.7 ct Loose Orange Sapphire, 4.5 x 4.5 mm Cushion Cut From Tanzania

3.7 carat Pink Topaz, Cushion loose Topaz from Brazil, Natural Gem, 10.2 x 8.1 mm

2.91 ct Loose Orange Sapphire, 10.6 x 7.1 mm Oval Cut From Thailand

2.21 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 8.2 x 8.1 mm

1.53 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10 x 8 mm

1.72 ct Pink Morganite, 7.8 x 5.6 mm Oval Cut From Afghanistan

0.48 ct Loose Purple Sapphire, 4.9 x 3.9 mm Oval Cut From Tanzania

17.32 ct Round Maw-Sit-Sit, 15.7 mm From Myanmar

4.75 carat White Topaz, Round loose Topaz from Brazil, Natural Untreated Gem, 10.3 mm

1 carat Trillion Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 8 x 8 mm

0.76 ct Loose Violet Sapphire, 5.8 x 5.1 mm Oval Cut From Tanzania

2.48 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.2 x 9.1 mm

3.07 ct Loose Yellow Sapphire, 5.1 mm Round Cut From Tanzania

0.76 carat Orange Hessonite Garnet, Baguette Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.1 x 3.8 mm

2.43 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 7.2 x 7.2 mm

1.49 ct Loose Green Tourmaline, 6.6 mm Round Cabochon From Mozambique

4.61 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm

1.12 carat Pear Shape Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.2 x 5.6 mm

1.21 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Gem, 10.8 x 7.3 mm

3.88 ct Oval Cut Black Opal, 11.3 x 8.3 mm From Ethiopia

1.58 ct Oval Cut Kornerupine, 7.9 x 6.4 mm From Sri Lanka

3.26 ct Yellow Quartz, 8.7 x 8.4 mm Carved From Brazil

1.72 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.1 mm

1.14 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5.5 mm

3.98 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

0.78 carat Green Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6 mm

Gemstone Information

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