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Buy Octagon Shape 30x22 mm Gems

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1.13ctw Natural Medium Green Peridot, Marquise, VS, Photo A

1.13ctw Natural Medium Green Peridot, Marquise, VS

Peridot

1.13ct total2 pcs
$ 12.20
8 x 4 mm (calibrated)
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21.63ctw Natural Black Spinel, Oval, Opaque, Photo A

21.63ctw Natural Black Spinel, Oval, Opaque

Spinel

21.63ct total2 pcs
$ 85.66
16 x 12 mm (calibrated)
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0.60ct Natural London Blue Topaz, Oval, VVS-VS, Photo A

0.60ct Natural London Blue Topaz, Oval, VVS-VS

Topaz

0.60ct1 pc
$ 4.20
6 x 4 mm (calibrated)
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32.77ct Natural Medium Light-Orange Druzy Citrine, Pear Shape, Opaque, Photo A

32.77ct Natural Medium Light-Orange Druzy Citrine, Pear Shape, Opaque

Druzy Citrine

32.77ct1 pc
$ 50.40
28 x 16.6 mm
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0.65ct Natural Very Pale Yellow Color-Change Diaspore, Square, VS, Photo A

0.65ct Natural Very Pale Yellow Color-Change Diaspore, Square, VS

Color-Change Diaspore

0.65ct1 pc
$ 29.09
5 x 5 mm (calibrated)
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23.21ct Natural Multicolor Jasper, Fancy, Opaque, Photo A

23.21ct Natural Multicolor Jasper, Fancy, Opaque

Jasper

23.21ct1 pc
$ 32.17
29.5 x 16.6 mm
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1.53ct Natural Multicolor Opal, Marquise, Translucent, Photo A

1.53ct Natural Multicolor Opal, Marquise, Translucent

Opal

1.53ct1 pc
$ 46.50
15.7 x 7 mm
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0.58ct Natural Twilight Blue Sapphire, Marquise, VVS-VS, Photo A

0.58ct Natural Twilight Blue Sapphire, Marquise, VVS-VS

Sapphire

0.58ct1 pc
$ 163.07
7.9 x 3.9 mm
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0.28ct Natural Medium Light-Violet Iolite, Pear Shape, VS, Photo A

0.28ct Natural Medium Light-Violet Iolite, Pear Shape, VS

Iolite

0.28ct1 pc
$ 13.44
6 x 4 mm (calibrated)
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0.31ct Natural Greenish Blue Sapphire, Oval, VVS, Photo A

0.31ct Natural Greenish Blue Sapphire, Oval, VVS

Sapphire

0.31ct1 pc
$ 52.08
4.5 x 3.6 mm
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6.35ct Natural Medium Violet Amethyst, Fancy, Transparent, Photo A

6.35ct Natural Medium Violet Amethyst, Fancy, Transparent

Amethyst

6.35ct1 pc
$ 38.10
14.8 x 10.8 mm
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5.07ct Natural Dark Brown Cat's Eye Scapolite, Oval, Translucent, Photo A

5.07ct Natural Dark Brown Cat's Eye Scapolite, Oval, Translucent

Cat's Eye Scapolite

5.07ct1 pc
$ 33.47
11.4 x 9.5 mm
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0.52ct Natural Olive Green Peridot, Marquise, VS, Photo A

0.52ct Natural Olive Green Peridot, Marquise, VS

Peridot

0.52ct1 pc
$ 9.36
8 x 4 mm (calibrated)
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1.43ctw Natural Golden-Yellow Citrine, Heart, VVS, Photo A

1.43ctw Natural Golden-Yellow Citrine, Heart, VVS

Citrine

1.43ct total2 pcs
$ 12.01
6 x 6 mm (calibrated)
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2.38ctw Natural Multicolor Andalusite, Round, VS-SI, Photo A

2.38ctw Natural Multicolor Andalusite, Round, VS-SI

Andalusite

2.38ct total9 pcs
$ 141.37
4 mm (calibrated)
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1.63ct Natural Lively Yellowish Green Sphene, Oval, Transparent, Photo A

1.63ct Natural Lively Yellowish Green Sphene, Oval, Transparent

Sphene

1.63ct1 pc
$ 9.78
6.9 x 6.2 mm
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1.03ct Natural Deep Golden Orange Citrine, Trillion, VVS-VS, Photo A

1.03ct Natural Deep Golden Orange Citrine, Trillion, VVS-VS

Citrine

1.03ct1 pc
$ 9.52
7 x 7 mm (calibrated)
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2.68ctw Natural Light Red Rubies, Oval, VS, Photo A

2.68ctw Natural Light Red Rubies, Oval, VS

Ruby

2.68ct total2 pcs
$ 321.60
7 x 5 mm (calibrated)
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32.51ct Natural Multicolor Rhodochrosite, Fancy, Opaque, Photo A

32.51ct Natural Multicolor Rhodochrosite, Fancy, Opaque

Rhodochrosite

32.51ct1 pc
$ 67.81
27.5 x 17.3 mm
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4.71ctw Natural Sky Blue Topaz, Octagon / Emerald Cut, VVS-VS, Photo A

4.71ctw Natural Sky Blue Topaz, Octagon / Emerald Cut, VVS-VS

Topaz

4.71ct total4 pcs
$ 43.20
7 x 5 mm (calibrated)
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6.47ct Natural Very Light Royal Purple Pink Kunzite, Octagon / Emerald Cut, VVS-VS, Photo A

6.47ct Natural Very Light Royal Purple Pink Kunzite, Octagon / Emerald Cut, VVS-VS

Kunzite

6.47ct1 pc
$ 194.10
14.4 x 7.8 mm
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54.71ct Natural Multicolor Boulder Opal, Oval, Opaque, Photo A
Boulder Opal Product Video (322038)

54.71ct Natural Multicolor Boulder Opal, Oval, Opaque

Boulder Opal

54.71ct1 pc
$ 505.52
27.3 x 23.3 mm
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1.00ct Natural Dark Green Tourmaline, Octagon / Emerald Cut, VS, Photo A

1.00ct Natural Dark Green Tourmaline, Octagon / Emerald Cut, VS

Tourmaline

1.00ct1 pc
$ 31.68
14.4 x 2.8 mm
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13.94ct Natural Dark Red Ruby, Oval, Translucent, Photo A

13.94ct Natural Dark Red Ruby, Oval, Translucent

Ruby

13.94ct1 pc
$ 434.93
16 x 12 mm (calibrated)
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0.45ct Natural Light Yellow Sapphire, Pear Shape, VVS, Photo A

0.45ct Natural Light Yellow Sapphire, Pear Shape, VVS

Sapphire

0.45ct1 pc
$ 60.47
7 x 5 mm (calibrated)
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1.27ct Natural Deep Magenta Spinel, Cushion, VVS-VS, Photo A

1.27ct Natural Deep Magenta Spinel, Cushion, VVS-VS

Spinel

1.27ct1 pc
$ 107.82
6.8 x 6.1 mm
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2.90ct Natural Bright Pinkish Violet Amethyst, Trillion, VS, Photo A

2.90ct Natural Bright Pinkish Violet Amethyst, Trillion, VS

Amethyst

2.90ct1 pc
$ 27.84
10 x 10 mm (calibrated)
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3.93ctw Natural Deep Navy Blue Star Sapphire, Oval, Opaque, Photo A

3.93ctw Natural Deep Navy Blue Star Sapphire, Oval, Opaque

Star Sapphire

3.93ct total4 pcs
$ 103.75
7 x 5 mm (calibrated)
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0.61ct Natural Apricot Orange Sphalerite, Round, VS-SI, Photo A

0.61ct Natural Apricot Orange Sphalerite, Round, VS-SI

Sphalerite

0.61ct1 pc
$ 36.60
5 mm (calibrated)
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12.07ct Natural Multicolor Ammolite, Fancy, Opaque, Photo A

12.07ct Natural Multicolor Ammolite, Fancy, Opaque

Ammolite

12.07ct1 pc
$ 159.32
18.4 x 14.9 mm
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2.06ct Natural Medium-Light Green Peridot, Cushion, VS, Photo A

2.06ct Natural Medium-Light Green Peridot, Cushion, VS

Peridot

2.06ct1 pc
$ 97.36
7.6 x 7.5 mm
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3.77ct Natural Warm Green Agate, Flower Cut, Translucent, Photo A

3.77ct Natural Warm Green Agate, Flower Cut, Translucent

Agate

3.77ct1 pc
$ 12.44
16.6 x 9.5 mm
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GemSelect Certified Store Reviews

GemSelect: Over 18 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

First time so this is an experiment! Shopping is so fun on this site, though!

Posted By Gem Delight in March, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been buying gems for several years off and on and love their selection and great low prices. I started out wanting to get an example of each type of gem but after looking at all the types of gems and reading about them I realize it is almost impossible for me to do. It took me years just to read about them all. Gem Select is the best gem site you can find. For information or to buy. Steve M.

Posted By Stevee M. in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was my second time so I understand what it is to do

Posted By Ibie in February, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site always looking for great deals and find them on this site

Posted By IRO5812 in July, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I've made several purchases through GemSelect in the past, although not within the last six months. Their gems are always beautiful and I have never had an issue with their prices or their stones. Even when I'm not buying, I love scrolling through their website, which is very user friendly. I especially appreciate being able to change the listing order to your own liking, such as most to least expensive, largest to smallest, etc. As with most online orders, however, I think the shipping charges are not commensurate with the actual weight of the items shipped.

Posted By DrLHS in November, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Always find more niche sizes/shapes as my unconventional designs require from this website. Recommending to fellow designers in the creative atmosphere on the usual, specially due to the quality and certification of gems.

Posted By Sina in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, trusted quality. What I have purchased has always been as discribed.

Posted By Sterling in November, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I like the way your website shows us what stone were buying as well the easy way to navigate the site. also knowing the stones are real...

Posted By RED in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

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 30 x 22 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.

Read All

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

First time so this is an experiment! Shopping is so fun on this site, though!

Posted By Gem Delight in March, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been buying gems for several years off and on and love their selection and great low prices. I started out wanting to get an example of each type of gem but after looking at all the types of gems and reading about them I realize it is almost impossible for me to do. It took me years just to read about them all. Gem Select is the best gem site you can find. For information or to buy. Steve M.

Posted By Stevee M. in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was my second time so I understand what it is to do

Posted By Ibie in February, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site always looking for great deals and find them on this site

Posted By IRO5812 in July, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I've made several purchases through GemSelect in the past, although not within the last six months. Their gems are always beautiful and I have never had an issue with their prices or their stones. Even when I'm not buying, I love scrolling through their website, which is very user friendly. I especially appreciate being able to change the listing order to your own liking, such as most to least expensive, largest to smallest, etc. As with most online orders, however, I think the shipping charges are not commensurate with the actual weight of the items shipped.

Posted By DrLHS in November, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Always find more niche sizes/shapes as my unconventional designs require from this website. Recommending to fellow designers in the creative atmosphere on the usual, specially due to the quality and certification of gems.

Posted By Sina in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, trusted quality. What I have purchased has always been as discribed.

Posted By Sterling in November, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I like the way your website shows us what stone were buying as well the easy way to navigate the site. also knowing the stones are real...

Posted By RED in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate
Enlarged Gemstone Image