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Buy Octagon Shape 30x22 mm Gems

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42.95ct Natural Multicolor Jasper, Fancy, Opaque, Photo A

42.95ct Natural Multicolor Jasper, Fancy, Opaque

Jasper

42.95ct1 pc
$ 25.51
35.6 x 29.2 mm
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10.88ctw Natural Multicolor Pietersite, Oval, Opaque, Photo A

10.88ctw Natural Multicolor Pietersite, Oval, Opaque

Pietersite

10.88ct total2 pcs
$ 30.68
16.8 x 10.6 mm
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2.12ctw Natural Intense Violet Blue Tanzanite, Pear Shape, VS, Photo A

2.12ctw Natural Intense Violet Blue Tanzanite, Pear Shape, VS

Tanzanite

2.12ct total10 pcs
$ 97.94
5 x 3.1 mm
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2.49ctw Natural Light Rose Pink Strawberry Quartz, Oval, Translucent, Photo A

2.49ctw Natural Light Rose Pink Strawberry Quartz, Oval, Translucent

Strawberry Quartz

2.49ct total2 pcs
$ 39.44
8 x 6 mm (calibrated)
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1.43ctw Natural Warm Green Demantoid Garnet, Oval, VS, Photo A

1.43ctw Natural Warm Green Demantoid Garnet, Oval, VS

Demantoid Garnet

1.43ct total4 pcs
$ 188.76
4.9 x 3.9 mm
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1.98ct Natural Medium Orange Hessonite Garnet, Octagon / Emerald Cut, SI, Photo A

1.98ct Natural Medium Orange Hessonite Garnet, Octagon / Emerald Cut, SI

Hessonite Garnet

1.98ct1 pc
$ 39.36
8 x 6 mm (calibrated)
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1.66ct Natural Pinkish Violet Amethyst, Trillion, VS, Photo A

1.66ct Natural Pinkish Violet Amethyst, Trillion, VS

Amethyst

1.66ct1 pc
$ 13.21
8 x 8 mm (calibrated)
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0.74ct Natural Multicolor Opal, Pear Shape, Transparent, Photo A

0.74ct Natural Multicolor Opal, Pear Shape, Transparent

Opal

0.74ct1 pc
$ 22.20
8 x 6 mm (calibrated)
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3.53ct Natural Multicolor Agate, Oval, Opaque, Photo A

3.53ct Natural Multicolor Agate, Oval, Opaque

Agate

3.53ct1 pc
$ 4.24
10 x 8.7 mm
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14.24ct Natural Gingerbread Brown Tiger's Eye, Baguette, Opaque, Photo A

14.24ct Natural Gingerbread Brown Tiger's Eye, Baguette, Opaque

Tiger's Eye

14.24ct1 pc
$ 17.09
18 x 13 mm (calibrated)
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1.89ct Natural Medium Dark-Orange Hessonite Garnet, Oval, VS, Photo A

1.89ct Natural Medium Dark-Orange Hessonite Garnet, Oval, VS

Hessonite Garnet

1.89ct1 pc
$ 34.79
9 x 7 mm (calibrated)
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50.45ctw Natural Multicolor Tourmaline, Flower Cut, Transparent, Photo A
Tourmaline Product Video (690537)

50.45ctw Natural Multicolor Tourmaline, Flower Cut, Transparent

Tourmaline

50.45ct total2 pcs
$ 1,184.77
27.7 x 21.8 mm
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2.90ct Natural Multicolor Labradorite, Baguette, Translucent, Photo A

2.90ct Natural Multicolor Labradorite, Baguette, Translucent

Labradorite

2.90ct1 pc
$ 4.80
9 x 7 mm (calibrated)
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4.17ct Natural Umber Brown Mother of Pearl, Fancy, Opaque, Photo A

4.17ct Natural Umber Brown Mother of Pearl, Fancy, Opaque

Mother of Pearl

4.17ct1 pc
$ 11.57
19.3 x 12.4 mm
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1.33ctw Natural Medium Blue Apatite, Oval, VS, Photo A

1.33ctw Natural Medium Blue Apatite, Oval, VS

Apatite

1.33ct total4 pcs
$ 32.00
5 x 4 mm (calibrated)
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0.83ct Natural Raspberry Pink Malaya Garnet, Round, VS, Photo A

0.83ct Natural Raspberry Pink Malaya Garnet, Round, VS

Malaya Garnet

0.83ct1 pc
$ 43.82
5.5 mm (calibrated)
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49.18ctw Natural Dark Gray Hematite, Marquise, Opaque, Photo A

49.18ctw Natural Dark Gray Hematite, Marquise, Opaque

Hematite

49.18ct total2 pcs
$ 57.78
25.1 x 11.7 mm
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29.83ct Natural Dark Blue Sodalite, Pear Shape, Opaque, Photo A

29.83ct Natural Dark Blue Sodalite, Pear Shape, Opaque

Sodalite

29.83ct1 pc
$ 35.80
44 x 19.9 mm
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0.38ct Natural Light Yellow Sapphire, Cushion, VS, Photo A

0.38ct Natural Light Yellow Sapphire, Cushion, VS

Sapphire

0.38ct1 pc
$ 36.48
3.9 x 3.8 mm
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3.20ct Natural Golden Orange Citrine, Oval, VVS, Photo A

3.20ct Natural Golden Orange Citrine, Oval, VVS

Citrine

3.20ct1 pc
$ 23.36
13 x 9 mm (calibrated)
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28.85ct Natural Seaweed Green Serpentine, Oval, Translucent, Photo A
Serpentine Product Video (671447)

28.85ct Natural Seaweed Green Serpentine, Oval, Translucent

Serpentine

28.85ct1 pc
$ 74.44
24.2 x 17 mm
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0.47ct Natural Golden Sapphire, Pear Shape, VVS-VS, Photo A

0.47ct Natural Golden Sapphire, Pear Shape, VVS-VS

Sapphire

0.47ct1 pc
$ 32.10
5.9 x 3.8 mm
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2.15ct Natural Light Green Prehnite, Oval, Transparent, Photo A

2.15ct Natural Light Green Prehnite, Oval, Transparent

Prehnite

2.15ct1 pc
$ 14.20
8.6 x 8 mm
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11.78ctw Natural Black Pietersite, Oval, Opaque, Photo A

11.78ctw Natural Black Pietersite, Oval, Opaque

Pietersite

11.78ct total2 pcs
$ 66.68
14 x 10 mm (calibrated)
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0.86ct Natural Deep Orange Hessonite Garnet, Cushion, SI, Photo A

0.86ct Natural Deep Orange Hessonite Garnet, Cushion, SI

Hessonite Garnet

0.86ct1 pc
$ 20.44
5 x 5 mm (calibrated)
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2.91ct Natural Dark Green Malachite, Oval, Opaque, Photo A

2.91ct Natural Dark Green Malachite, Oval, Opaque

Malachite

2.91ct1 pc
$ 2.69
8.5 x 6.8 mm
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2.38ct Natural Multicolor Agate, Round, Opaque, Photo A

2.38ct Natural Multicolor Agate, Round, Opaque

Agate

2.38ct1 pc
$ 4.86
8.5 mm (calibrated)
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26.64ct Natural Bluish Green Turquoise, Oval, Opaque, Photo A

26.64ct Natural Bluish Green Turquoise, Oval, Opaque

Turquoise

26.64ct1 pc
$ 95.90
22.9 x 15.9 mm
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0.73ct Natural Medium Orange Sapphire, Round, VS, Photo A

0.73ct Natural Medium Orange Sapphire, Round, VS

Sapphire

0.73ct1 pc
$ 43.37
5 mm (calibrated)
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2.87ctw Natural Gold Citrine, Octagon / Emerald Cut, VVS-VS, Photo A

2.87ctw Natural Gold Citrine, Octagon / Emerald Cut, VVS-VS

Citrine

2.87ct total2 pcs
$ 27.55
8 x 6 mm (calibrated)
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4.91ct Natural Golden-Orange Cat's Eye Opal, Oval, Opaque, Photo A

4.91ct Natural Golden-Orange Cat's Eye Opal, Oval, Opaque

Cat's Eye Opal

4.91ct1 pc
$ 17.68
13.4 x 9.9 mm
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1.23ct Natural Swiss Blue Topaz, Trillion, VS, Photo A

1.23ct Natural Swiss Blue Topaz, Trillion, VS

Topaz

1.23ct1 pc
$ 11.36
6.9 x 6.7 mm
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GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

I love the quality, package and info of your gems.

Posted By Diana in April, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I love wide range of stones. Always have my preference.

Posted By Ray in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Site is easy to navigate and the variety is great and how often new products are added is also great.

Posted By Jhidron in March, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The checkout said the my ccv was invalid. i had to use another card.

Posted By Ron in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience shopping and finding what I was looking for, the only improvement I could think of would be allowing to filter more than one size at a time.

Posted By Tlicious04 in September, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Easy website to navigate, lots of different varieties and options to choose from.

Posted By Brian in July, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

went well

Posted By Doug in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Im not a jeweler, I buy for my personal use. My dad was a jewelry maker and I love gemstones.

Posted By Andie in September, 2024
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.

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Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

I love the quality, package and info of your gems.

Posted By Diana in April, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I love wide range of stones. Always have my preference.

Posted By Ray in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Site is easy to navigate and the variety is great and how often new products are added is also great.

Posted By Jhidron in March, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The checkout said the my ccv was invalid. i had to use another card.

Posted By Ron in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience shopping and finding what I was looking for, the only improvement I could think of would be allowing to filter more than one size at a time.

Posted By Tlicious04 in September, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Easy website to navigate, lots of different varieties and options to choose from.

Posted By Brian in July, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

went well

Posted By Doug in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Im not a jeweler, I buy for my personal use. My dad was a jewelry maker and I love gemstones.

Posted By Andie in September, 2024
Source: Bizrate
Enlarged Gemstone Image