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Buy Octagon Shape 30x22 mm Gems

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1.12 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.1 x 4 mm, Photo A

1.12 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.1 x 4 mm

Topaz

1.12ct total2 pcs
$ 8.96
6.1 x 4 mm
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1.65 ct Purple Spinel, 7.6 x 6.9 mm Cushion Cut From Tanzania, Photo A

1.65 ct Purple Spinel, 7.6 x 6.9 mm Cushion Cut From Tanzania

Spinel

1.65ct1 pc
$ 117.98
7.6 x 6.9 mm
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39.54 ct Round Hematite, 22.5 mm From Brazil, Photo A

39.54 ct Round Hematite, 22.5 mm From Brazil

Hematite

39.54ct1 pc
$ 38.71
22.5 mm
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0.47 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.7 x 4 mm, Photo A

0.47 carat Yellow Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.7 x 4 mm

Sapphire

0.47ct1 pc
$ 25.02
5.7 x 4 mm
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1.07 carat Pear Shape Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7 x 5.1 mm, Photo A
Click for Product Video (569920)

1.07 carat Pear Shape Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7 x 5.1 mm

Ruby

1.07ct1 pc
$ 788.61
7 x 5.1 mm
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4.05 ct Drilled Sphere Rutile Quartz, 8 mm From India, Photo A

4.05 ct Drilled Sphere Rutile Quartz, 8 mm From India

Rutile Quartz

4.05ct1 pc
$ 4.68
8 mm
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0.92 ct Loose Multicolor Sapphire, 5.1 x 5.1 mm Cushion Cut From Madagascar, Photo A

0.92 ct Loose Multicolor Sapphire, 5.1 x 5.1 mm Cushion Cut From Madagascar

Sapphire

0.92ct1 pc
$ 73.60
5.1 x 5.1 mm
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41.94 ct Marquise Jasper, 39.9 x 19.9 mm From Indonesia, Photo A

41.94 ct Marquise Jasper, 39.9 x 19.9 mm From Indonesia

Jasper

41.94ct1 pc
$ 32.96
39.9 x 19.9 mm
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13 ct Oval Jasper, 19.9 x 15.1 mm From Indonesia, Photo A

13 ct Oval Jasper, 19.9 x 15.1 mm From Indonesia

Jasper

13.00ct1 pc
$ 34.46
19.9 x 15.1 mm
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1.72 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 8.2 x 8.1 mm, Photo A

1.72 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 8.2 x 8.1 mm

Citrine

1.72ct1 pc
$ 13.24
8.2 x 8.1 mm
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22.7 ct White Quartz, 32.9 x 10.1 mm Carved From Brazil, Photo A

22.7 ct White Quartz, 32.9 x 10.1 mm Carved From Brazil

Quartz

22.70ct total2 pcs
$ 74.91
32.9 x 10.1 mm
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2.48 carat Pear Shape Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 3.9 x 2.9 mm, Photo A

2.48 carat Pear Shape Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 3.9 x 2.9 mm

Tsavorite Garnet

2.48ct total20 pcs
$ 136.40
3.9 x 2.9 mm
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21.43 ct Odd Shaped Agate Geode, 17.3 x 15 mm From Mexico, Photo A
Click for Product Video (456026)

21.43 ct Odd Shaped Agate Geode, 17.3 x 15 mm From Mexico

Agate Geode

21.43ct total2 pcs
$ 42.86
17.3 x 15 mm
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2.4 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 9.8 x 7.9 mm, Photo A

2.4 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 9.8 x 7.9 mm

Tanzanite

2.40ct1 pc
$ 20.86
9.8 x 7.9 mm
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0.77 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.2 x 5.2 mm, Photo A

0.77 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.2 x 5.2 mm

Emerald

0.77ct1 pc
$ 61.60
6.2 x 5.2 mm
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4.08 ct Diamond Cut Andalusite, 3.4 mm From Brazil, Photo A

4.08 ct Diamond Cut Andalusite, 3.4 mm From Brazil

Andalusite

4.08ct total30 pcs
$ 180.10
3.4 mm
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7.87 ct Green Agate, 12.7 x 11.7 mm Oval Cut From India, Photo A

7.87 ct Green Agate, 12.7 x 11.7 mm Oval Cut From India

Agate

7.87ct1 pc
$ 8.66
12.7 x 11.7 mm
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17.22 ct Loose Fancy Charoite, 23.5 x 13.9 mm From Russia, Photo A

17.22 ct Loose Fancy Charoite, 23.5 x 13.9 mm From Russia

Charoite

17.22ct1 pc
$ 28.59
23.5 x 13.9 mm
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1.24 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18 x 2.9 mm, Photo A

1.24 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18 x 2.9 mm

Tourmaline

1.24ct1 pc
$ 26.32
18 x 2.9 mm
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1.16 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6 x 6 mm, Photo A

1.16 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6 x 6 mm

Hessonite Garnet

1.16ct1 pc
$ 19.54
6 x 6 mm
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4.4 carat Pear Prehnite, loose Certified Prehnite from South Africa, Natural Untreated Gem, 12.1 x 8.4 mm, Photo A

4.4 carat Pear Prehnite, loose Certified Prehnite from South Africa, Natural Untreated Gem, 12.1 x 8.4 mm

Prehnite

4.40ct1 pc
$ 9.68
12.1 x 8.4 mm
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2.46 ct Marquise Labradorite, 12.2 x 6.1 mm From Madagascar, Photo A

2.46 ct Marquise Labradorite, 12.2 x 6.1 mm From Madagascar

Labradorite

2.46ct1 pc
$ 4.33
12.2 x 6.1 mm
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22.29 ct Marquise Chalcedony, 30.9 x 16.9 mm From Brazil, Photo A

22.29 ct Marquise Chalcedony, 30.9 x 16.9 mm From Brazil

Chalcedony

22.29ct1 pc
$ 55.73
30.9 x 16.9 mm
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0.92 ct Octagon Cut Peridot, 7 x 5 mm From China, Photo A

0.92 ct Octagon Cut Peridot, 7 x 5 mm From China

Peridot

0.92ct1 pc
$ 14.72
7 x 5 mm
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12.72 ct Oval Rainbow Moonstone, 18.1 x 12.8 mm From the United States, Photo A

12.72 ct Oval Rainbow Moonstone, 18.1 x 12.8 mm From the United States

Rainbow Moonstone

12.72ct1 pc
$ 12.72
18.1 x 12.8 mm
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3.07 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.8 x 7.1 mm, Photo A

3.07 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.8 x 7.1 mm

Topaz

3.07ct1 pc
$ 23.64
14.8 x 7.1 mm
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0.94 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 5.9 x 5.8 mm, Photo A

0.94 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 5.9 x 5.8 mm

Citrine

0.94ct1 pc
$ 6.58
5.9 x 5.8 mm
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31.42 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 21.8 x 17.1 mm, Photo A

31.42 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 21.8 x 17.1 mm

Amethyst

31.42ct1 pc
$ 251.36
21.8 x 17.1 mm
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3.57 ct Oval Coral, 15.2 x 10.8 mm From Indonesia, Photo A

3.57 ct Oval Coral, 15.2 x 10.8 mm From Indonesia

Coral

3.57ct1 pc
$ 11.78
15.2 x 10.8 mm
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2.36 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 9 x 6.9 mm, Photo A

2.36 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 9 x 6.9 mm

Topaz

2.36ct1 pc
$ 18.17
9 x 6.9 mm
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3.44 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.2 x 9 mm, Photo A

3.44 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.2 x 9 mm

Amethyst

3.44ct1 pc
$ 26.49
13.2 x 9 mm
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0.24 ct Marquise Cut Iolite, 5.8 x 3 mm From Brazil, Photo A

0.24 ct Marquise Cut Iolite, 5.8 x 3 mm From Brazil

Iolite

0.24ct1 pc
$ 9.60
5.8 x 3 mm
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Photos are of Actual Products for Sale

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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