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Octagon Shape 30x22 mm Gems Weight
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2.06 ct Oval Cut Andalusite, 5.2 x 4.2 mm From Brazil, Photo A

2.06 ct Oval Cut Andalusite, 5.2 x 4.2 mm From Brazil

Andalusite

2.06ct total5 pcs
$ 110.90
5.2 x 4.2 mm
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27.5 ct Pencil Cut Tiger's Eye, 40.1 x 9.4 mm From Thailand, Photo A

27.5 ct Pencil Cut Tiger's Eye, 40.1 x 9.4 mm From Thailand

Tiger's Eye

27.50ct1 pc
$ 2.75
40.1 x 9.4 mm
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22.58 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 20 x 15 mm, Photo A

22.58 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 20 x 15 mm

Topaz

22.58ct1 pc
$ 173.87
20 x 15 mm
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6.3 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 9.9 x 8 mm, Photo A

6.3 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 9.9 x 8 mm

Topaz

6.30ct total2 pcs
$ 48.16
9.9 x 8 mm
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2.86 carat Round Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.1 mm, Photo A

2.86 carat Round Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.1 mm

Rhodolite Garnet

2.86ct total4 pcs
$ 62.92
5.1 mm
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5.19 ct Oval Tiger's Eye, 14 x 10.3 mm From India, Photo A

5.19 ct Oval Tiger's Eye, 14 x 10.3 mm From India

Tiger's Eye

5.19ct1 pc
$ 3.06
14 x 10.3 mm
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3.5 ct Loose Oval Concave Cut Mystic Quartz, 9.1 x 6.9 mm From Brazil, Photo A

3.5 ct Loose Oval Concave Cut Mystic Quartz, 9.1 x 6.9 mm From Brazil

Mystic Quartz

3.50ct total2 pcs
$ 21.00
9.1 x 6.9 mm
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0.69 carat Green Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 4.9 mm, Photo A

0.69 carat Green Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 4.9 mm

Tourmaline

0.69ct1 pc
$ 12.65
4.9 mm
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10.02 ct Rainbow Pyrite, 17.2 x 16.9 mm From Russia, Photo A

10.02 ct Rainbow Pyrite, 17.2 x 16.9 mm From Russia

Rainbow Pyrite

10.02ct1 pc
$ 26.05
17.2 x 16.9 mm
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8.62 carat Blue Green Apatite, Pear Shape loose Apatite from Madagascar, Natural Gem, 17.6 x 9.7 mm, Photo A
Apatite Product Video (656799)

8.62 carat Blue Green Apatite, Pear Shape loose Apatite from Madagascar, Natural Gem, 17.6 x 9.7 mm

Apatite

8.62ct1 pc
$ 1,724.00
17.6 x 9.7 mm
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3.71 ct Asscher Cut Rose Quartz, 9.5 x 9.4 mm From South Africa, Photo A

3.71 ct Asscher Cut Rose Quartz, 9.5 x 9.4 mm From South Africa

Rose Quartz

3.71ct1 pc
$ 20.41
9.5 x 9.4 mm
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44.98 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 44.3 x 24 mm, Photo A

44.98 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 44.3 x 24 mm

Jasper

44.98ct1 pc
$ 49.48
44.3 x 24 mm
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24.95 ct Oval Rose Quartz, 20.3 x 15.6 mm From South Africa, Photo A

24.95 ct Oval Rose Quartz, 20.3 x 15.6 mm From South Africa

Rose Quartz

24.95ct1 pc
$ 54.89
20.3 x 15.6 mm
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1.72 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 6.1 mm, Photo A

1.72 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 6.1 mm

Pyrope Garnet

1.72ct total2 pcs
$ 13.24
6 x 6.1 mm
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0.85 carat Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7 x 5 mm, Photo A

0.85 carat Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7 x 5 mm

Topaz

0.85ct1 pc
$ 6.80
7 x 5 mm
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2.86 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm, Photo A

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

Pyrope Garnet

2.86ct total6 pcs
$ 22.02
4 x 4 mm
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7.09 ct Oval Tiger's Eye, 13.8 x 10 mm From Thailand, Photo A

7.09 ct Oval Tiger's Eye, 13.8 x 10 mm From Thailand

Tiger's Eye

7.09ct1 pc
$ 7.09
13.8 x 10 mm
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28.04 ct Cushion Fossil Coral, 20.2 x 13.5 mm From Indonesia, Photo A

28.04 ct Cushion Fossil Coral, 20.2 x 13.5 mm From Indonesia

Fossil Coral

28.04ct total2 pcs
$ 61.07
20.2 x 13.5 mm
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5.22 ct Yellow Moonstone, 14.1 x 10.2 mm Oval Cut From India, Photo A

5.22 ct Yellow Moonstone, 14.1 x 10.2 mm Oval Cut From India

Moonstone

5.22ct1 pc
$ 28.71
14.1 x 10.2 mm
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1.95 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.2 x 5.2 mm, Photo A
Tourmaline Product Video (566472)

1.95 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.2 x 5.2 mm

Tourmaline

1.95ct1 pc
$ 107.25
9.2 x 5.2 mm
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8.96 ct Cushion Tiger's Eye, 14 x 11.8 mm From Thailand, Photo A

8.96 ct Cushion Tiger's Eye, 14 x 11.8 mm From Thailand

Tiger's Eye

8.96ct1 pc
$ 11.65
14 x 11.8 mm
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0.6 ct Loose Orange Sapphire, 4.3 x 4.3 mm Cushion Cut From Tanzania, Photo A

0.6 ct Loose Orange Sapphire, 4.3 x 4.3 mm Cushion Cut From Tanzania

Sapphire

0.60ct1 pc
$ 32.73
4.3 x 4.3 mm
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1.41 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 6 x 6 mm, Photo A

1.41 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 6 x 6 mm

Citrine

1.41ct total2 pcs
$ 9.87
6 x 6 mm
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1.72 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.9 x 6.5 mm, Photo A

1.72 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.9 x 6.5 mm

Hessonite Garnet

1.72ct1 pc
$ 34.40
7.9 x 6.5 mm
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2.74 ct Oval Checkerboard Smoky Quartz, 9.5 x 7.5 mm From Brazil, Photo A

2.74 ct Oval Checkerboard Smoky Quartz, 9.5 x 7.5 mm From Brazil

Smoky Quartz

2.74ct1 pc
$ 19.18
9.5 x 7.5 mm
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11.04 ct Marquise Ruby-Zoisite, 22.6 x 10.5 mm From Tanzania, Photo A

11.04 ct Marquise Ruby-Zoisite, 22.6 x 10.5 mm From Tanzania

Ruby-Zoisite

11.04ct1 pc
$ 33.40
22.6 x 10.5 mm
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25.43 ct Marquise Hematite, 24.5 x 12.8 mm From Brazil, Photo A

25.43 ct Marquise Hematite, 24.5 x 12.8 mm From Brazil

Hematite

25.43ct1 pc
$ 25.74
24.5 x 12.8 mm
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3.68 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 15 x 7 mm, Photo A

3.68 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 15 x 7 mm

Topaz

3.68ct1 pc
$ 28.34
15 x 7 mm
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5.59 ct Asscher Cut Rose Quartz, 11.2 x 11.1 mm From South Africa, Photo A

5.59 ct Asscher Cut Rose Quartz, 11.2 x 11.1 mm From South Africa

Rose Quartz

5.59ct1 pc
$ 30.75
11.2 x 11.1 mm
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12.6 ct Yellow Quartz, 16 mm Round Concave Cut From Brazil, Photo A

12.6 ct Yellow Quartz, 16 mm Round Concave Cut From Brazil

Quartz

12.60ct1 pc
$ 50.73
16 mm
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7.08 carat Carved Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12.4 x 11.8 mm, Photo A

7.08 carat Carved Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12.4 x 11.8 mm

Amethyst

7.08ct1 pc
$ 35.40
12.4 x 11.8 mm
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14.15 ct Square Lapis Lazuli, 11 x 10.9 mm From Afghanistan, Photo A

14.15 ct Square Lapis Lazuli, 11 x 10.9 mm From Afghanistan

Lapis Lazuli

14.15ct total2 pcs
$ 28.02
11 x 10.9 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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