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

GemSelect has the Best gems. Clear photos and detailed description helps me make the best choice. I have Never been disappointed by thier quality items.

Posted By Rock Hound in July, 2023

Source: Bizrate

Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

Source: Bizrate

Overall Rating -> 10

Easy to use,I have spent many hours looking at the site

Posted By Skip in November, 2023

Source: Bizrate

Overall Rating -> 10

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

Source: Bizrate

Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

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

Posted By Apps in September, 2023

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

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

Source: Bizrate

Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 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

The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

Posted By T-bone in October, 2023

Source: Bizrate

Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

Source: Bizrate

Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

Posted By Orchidisle in February, 2024

Source: Bizrate

Overall Rating -> 10

Interested in unusual stones and found many that I purchased or will purchase in the near future. I have been a customer of gem select for almost ten years and have always been pleased with buying experience and the delivered product

Posted By Fairhope Pete in December, 2023

Source: Bizrate

Gemstones A-Z

Buy Octagon / Emerald Cut Gems

2.42 carat Orange Zircon, Oval loose Zircon from Tanzania, Natural Untreated Gem, 7 x 6.3 mm

15.86 ct Carved Rose Quartz, 17.4 x 16.8 mm From Brazil

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

0.2 ct Black Diamond, 2.8 x 2.8 mm Princess Cut From India

0.82 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.1 x 4.2 mm

2.65 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 13.1 x 7.9 mm

2.41 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4 mm

1.93 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.3 x 6.7 mm

1.03 carat Bi-color Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 6.1 x 5 mm

15.75 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 26.3 x 17.8 mm

25.42 ct Fancy Quartz With Marcasite, 44.7 x 11.4 mm From Brazil

1.76 carat Yellow Citrine, Carved Flower loose Citrine from Brazil, Natural Untreated Gem, 7.5 x 7.4 mm

0.67 carat Heart Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 6 x 5.9 mm

1.34 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.2 x 4.2 mm

43.58 ct Oval Rainbow Moonstone, 30.5 x 20.7 mm From the United States

1.24 carat Pink Morganite, Pear Shape loose Morganite from Brazil, Natural Untreated Gem, 12.8 x 5.8 mm

0.91 ct Loose Baguette Cut Smoky Quartz, 6.5 x 5.4 mm From Brazil

1.13 carat Yellow Citrine, Emerald-Cut loose Citrine from Brazil, Natural Untreated Gem, 8 x 6 mm

2.03 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gems, 6.1 x 6 mm

1.57 carat Baguette Facet Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 3 x 1.8 mm

2.08 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 5.9 x 4.3 mm

2.1 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.9 x 5 mm

0.52 ct Loose Yellow Sapphire, 4.1 x 4.1 mm Square Cut From Tanzania

17.6 ct Odd Shaped Rainbow Pyrite, 17.7 x 13.4 mm From Russia

3.3 ct Loose Oval Concave Cut Mystic Quartz, 9.2 x 7.1 mm From Brazil

4.15 carat Yellow Citrine, Emerald Cut loose Citrine from Bolivia, Natural Untreated Gem, 10.8 x 9 mm

2.79 ct Carved Rose Quartz, 13.1 x 9.2 mm From South Africa

0.79 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6.1 x 6 mm

1.85 ct Oval Cut Peridot, 7.1 x 5 mm From China

0.99 ct Blue Kyanite, 7.1 x 5 mm Oval Cut From Nepal

0.05 ct Black Diamond, 2.4 mm Diamond Cut From India

7.15 carat White Topaz, Square loose Topaz from Brazil, Natural Untreated Gems, 5.1 x 5 mm

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