Loose Octagon Cut Gemstones for Sale - In Stock, ready to Ship

The octagon or emerald-cut is a shape that was developed to maximize the color of emerald gemstones. Therefore, if you are looking for a gem that shows pure, unadulterated color at its best, emerald cut gems are the right choice. The octagon-cut showcases the color of a gemstone.

Octagonal colored gemstones from GemSelect include large stones, matched pairs and lots. Among the choices are both precious and semi-precious octagonal gems, for example, bicolored ametrine, tourmaline, emerald, amethyst, smoky quartz, diamond, topaz, tanzanite and tsavorite garnet. There are emerald-cut gemstones of every color, size, shape and cutting style available. Some emerald-cut gems are square and others are long and rectangular.

To find the octagonal gemstones that you seek, filter the results further by using the left-hand menu. You can buy emerald-cut stones by gem type or color. By using the top menu, you can search by carat weight, size, price and other factors, to enable you to find the exact emerald-cut gems that you are looking for. All items are in stock and ready to be shipped.

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Gemstone Information

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Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 9

Overall good, shipping prices just seem a little on the high side.

Posted By Steve in August, 2023

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Overall Rating -> 10

The website is easy to navigate and the images are incredible.

Posted By Lindsy in October, 2023

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Overall Rating -> 10

Always have good experience

Posted By Ginnie in September, 2023

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Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

Source: Bizrate

Overall Rating -> 10

I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

Posted By JamesMichael781 in September, 2023

Source: Bizrate

Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

Source: Bizrate

Overall Rating -> 9

making my own jewelry for my birth stone

Posted By LoveGeo in July, 2023

Source: Bizrate

Overall Rating -> 10

My first order. I am anxious to see if what I ordered is what I receive.

Posted By KRJ in July, 2023

Source: Bizrate

Overall Rating -> 9

Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

Posted By Erick in July, 2023

Source: Bizrate

Overall Rating -> 10

I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

Posted By Oakcityceo in May, 2023

Source: Bizrate

Overall Rating -> 10

I bought a small ring green so I may practice my jewelry making.

Posted By HairyOtter in July, 2023

Source: Bizrate

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Gemstones A-Z

Buy Octagon / Emerald Cut Gems

1.6 ct Round Cat's Eye Moonstone, 8 mm From India

4.32 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.9 x 9.9 mm

1.65 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5.1 mm

2.41 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

4.76 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm

6.68 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 10.2 x 8.1 mm

0.42 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 5.9 x 4 mm

0.58 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gem, 5 x 5 mm

0.88 carat Green Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.8 x 4.7 mm

0.97 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 8.6 x 4 mm

2.15 ct Orange Moonstone, 6 x 6 mm Cushion Cut From India

7.33 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.1 mm

3.17 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 11.5 x 8.7 mm

0.8 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gem, 6.2 x 4.1 mm

11.29 ct Oval Pietersite, 19.2 x 13.8 mm From Namibia

95.55 carat Pear Shape Rose Quartz, loose Certified Rose Quartz from South Africa, Natural Untreated Gem, 41.6 x 30.7 mm

0.62 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 6.7 x 4.9 mm

16 ct Blue Green Turquoise, 20.8 mm Round Cut From China

1.01 ct Blue Kyanite, 6 mm Round Cut From Nepal

0.65 ct Pink Spinel, 5.3 x 4.6 mm Cushion Cut From Tanzania

0.86 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Madagascar, Natural Untreated Gems, 4.2 x 4.1 mm

1.23 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 7 mm

12.92 carat Green Agate, Pear loose Agate from India, Natural Gem, 17.3 x 13.9 mm

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

4.61 ct Oval Tiger's Eye, 10.8 x 8.8 mm From Thailand

3.09 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.2 x 9.9 mm

5.89 ct Round Prehnite, 7.5 mm From South Africa

6.36 ct Green Amazonite, 7.2 x 7.2 mm Cushion Cut From Madagascar

35.01 ct Oval Rhodochrosite, 33.4 x 14 mm From South Africa

10.22 ct Oval Strawberry Quartz, 14.7 x 12.3 mm From Russia

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

3.49 ct Green Agate, 18.5 x 9.3 mm Carved From India

Gemstone Information

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