Buy Calibrated 6x4mm Octagon Shape Natural Gems at GemSelect

GemSelect’s octagon (Emerald) shape 6x4mm gems are the ideal size for earrings, bracelets, and rings. Our calibrated gems are the perfect solution for new designs and repairs to existing pieces. The specifications of our stones ensure our stones to be within 0.24mm of the specified size making it easy to replace lost or damaged stones for cherished pieces. Our octagon-shaped gemstones are available in single units, pairs, lots, and multi-colored lots to assist you in selection.

A pair of earrings or a ring including GemSlect's 6x4mm octagon shaped gemstones can make an excellent anniversary gift for a cherished partner. We find the octagon or emerald cut to be ideal for a ring or earrings featured gem as it embodies the traditional design for a stone. The style of this gem gives the jewelry a classic feel that's always fashionable to wear. Our 6x4mm octagon stones arrange well when placed horizontally into a bracelet. Though they are seen most commonly in symmetrical arrangements, they can also appear in asymmetrical designs if set correctly.

6x4mm octagon-cut precious and semi-precious gemstones are available through GemSelect at wholesale prices. For additional information about each gemstone click the specific stone or stones of your choice. In this section, you will find detail including the weight of the gem, color, origin, treatment, cut, and all other applicable information.

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Gemstone Information

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Overall Rating -> 10

I was looking for ammolite for my husband. Other websites are not always clear about whether they have genuine ammolite or simulated ammolite. I have purchased from GemSelect before and trust that the stones are genuine. Finding the stones I want is easy, and I love all of the search filter options!

Posted By Ana in September, 2023

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Overall Rating -> 10

It was easy to navigate and I hope that the gem is as nice as the picture

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Overall Rating -> 10

Love Gem select. great gems for the price. Can't beet them

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Overall Rating -> 10

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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.

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Overall Rating -> 10

I particularly like information about product provided with purchase.

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it was good

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Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

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Overall Rating -> 10

Easy to use website, made it very easy to buy. Will shop here again.

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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

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Overall Rating -> 10

was just windowshopping and spotted a couple "Very Uncommons", a tsavorite & a demantoid garnet that were both in a size I was looking for, & that I could very easily pay for -- so figured I would grab the tsavo ASAP and got the demantoid to accompany so they wouldn't be lonely.

Posted By Kittypie070 in April, 2024

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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.

Posted By PixelComposer in January, 2024

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Overall Rating -> 10

Was easy to search for many gems and mineral stones.Authenticity of natural stones is important, and I feel this site offers some assurance on this.

Posted By DanM in November, 2023

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Overall Rating -> 10

Great site

Posted By Lord of Bananas in November, 2023

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Gemstones A-Z

Buy Octagon Shape 6x4 mm Gems

3.86 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 9 mm

1.64 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.7 mm

4.67 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14 x 9.9 mm

12.59 carat Carved Rose Mother of Pearl, loose Certified Mother of Pearl from China, Natural Gem, 24.8 x 15.9 mm

3.59 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 9.9 x 7.8 mm

5.85 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 10.1 x 7.9 mm

11.02 carat Blue Green Fluorite, Cushion loose Fluorite from India, Natural Untreated Gem, 13.6 x 9.8 mm

13.12 ct Cushion Concave Cut Mystic Quartz, 12 x 12 mm From Brazil

0.5 ct Loose Purple Sapphire, 5.6 x 4.1 mm Oval Cut From Madagascar

0.25 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.7 mm

35.68 ct Drilled Sphere Rhodochrosite, 15.5 mm From South Africa

7.24 ct Pink Morganite, 12 mm Round Cut From Afghanistan

5.9 ct Carved Prehnite, 13.4 x 10 mm From South Africa

10.1 ct Rainbow Pyrite, 19.3 x 10.9 mm From Russia

2.46 carat Orange Spessartite Garnet, Asscher loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 7.1 x 6.9 mm

2.17 ct Oval Spectrolite, 10 x 8.4 mm From Finland

1.77 ct White Moonstone, 6.7 mm Round Cut From India

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

1.33 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.8 x 4.9 mm

1.55 carat White Zircon, Emerald Cut loose Zircon from Myanmar, Natural Gem, 7.1 x 5 mm

1.26 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.4 x 4.2 mm

2.87 ct Loose Square Cut Sapphire, 3 x 3 mm From Tanzania

5.81 ct White Quartz, 11.9 mm Diamond Cut From Brazil

1.27 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7 x 5.1 mm

1.94 ct Yellow Beryl, 9.1 mm Round Cut From Madagascar

10.69 ct Yellow Quartz, 12.1 mm Round Concave Cut From Brazil

1.52 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 8.1 x 6 mm

13.52 carat Pear Checkerboard Labradorite, loose Certified Labradorite from Madagascar, Natural Untreated Gems, 18.2 x 13.3 mm

27.08 ct Cushion Obsidian, 31.7 x 21.7 mm From India

1.43 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 x 5.1 mm

0.63 carat Purple Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6.5 x 4.2 mm

67.93 ct Oval Jasper, 37.2 x 30.8 mm From Indonesia

Gemstone Information

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