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Buy Oval Shape 18x13 mm Gems

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Oval Shape 18x13 mm Gems Weight Oval Shape 18x13 mm Gems Size Oval Shape 18x13 mm Gems Clarity Oval Shape 18x13 mm Gems Price Oval Shape 18x13 mm Gems Origin
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1.43 ct Oval Cut Peridot, 8.1 x 6.1 mm From China, Photo A

1.43 ct Oval Cut Peridot, 8.1 x 6.1 mm From China

Peridot

1.43ct1 pc
$ 10.01
8.1 x 6.1 mm
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5.94 carat Swiss Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9.1 x 9 mm, Photo A

5.94 carat Swiss Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9.1 x 9 mm

Topaz

5.94ct total2 pcs
$ 42.67
9.1 x 9 mm
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26.25 ct Round Checkerboard Labradorite, 20.2 mm From Madagascar, Photo A

26.25 ct Round Checkerboard Labradorite, 20.2 mm From Madagascar

Labradorite

26.25ct total2 pcs
$ 57.75
20.2 mm
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1.29 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.4 x 5.9 mm, Photo A

1.29 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.4 x 5.9 mm

Hessonite Garnet

1.29ct1 pc
$ 25.80
7.4 x 5.9 mm
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1.9 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7 mm, Photo A

1.9 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7 mm

Hessonite Garnet

1.90ct1 pc
$ 35.53
7 mm
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16.81 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 26.5 x 13.3 mm, Photo A

16.81 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 26.5 x 13.3 mm

Ammolite

16.81ct1 pc
$ 184.91
26.5 x 13.3 mm
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4.66 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 16.1 x 9.5 mm, Photo A

4.66 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 16.1 x 9.5 mm

Pietersite

4.66ct1 pc
$ 11.04
16.1 x 9.5 mm
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1.75 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 6 mm, Photo A

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

Pyrope Garnet

1.75ct total2 pcs
$ 13.48
6 x 6 mm
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4.25 ct Asscher Cut Rose Quartz, 9.8 x 9.8 mm From South Africa, Photo A

4.25 ct Asscher Cut Rose Quartz, 9.8 x 9.8 mm From South Africa

Rose Quartz

4.25ct1 pc
$ 23.38
9.8 x 9.8 mm
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8.14 carat Green Opal, Oval loose Opal from Brazil, Natural Untreated Gem, 16.6 x 14.3 mm, Photo A

8.14 carat Green Opal, Oval loose Opal from Brazil, Natural Untreated Gem, 16.6 x 14.3 mm

Opal

8.14ct1 pc
$ 17.50
16.6 x 14.3 mm
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83.59 ct Carved Ruby-Zoisite, 55.2 x 35.7 mm From Tanzania, Photo A
Click for Product Video (588862)

83.59 ct Carved Ruby-Zoisite, 55.2 x 35.7 mm From Tanzania

Ruby-Zoisite

83.59ct1 pc
$ 236.56
55.2 x 35.7 mm
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3.29 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.6 x 6.9 mm, Photo A

3.29 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.6 x 6.9 mm

Topaz

3.29ct1 pc
$ 25.33
14.6 x 6.9 mm
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1.67 ct Oval Sillimanite Cat's Eye, 6.8 x 5 mm From Madagascar, Photo A

1.67 ct Oval Sillimanite Cat's Eye, 6.8 x 5 mm From Madagascar

Sillimanite Cat's Eye

1.67ct total2 pcs
$ 5.51
6.8 x 5 mm
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2.76 carat Trillion Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm, Photo A

2.76 carat Trillion Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm

Pyrope Garnet

2.76ct total10 pcs
$ 21.25
4 x 4 mm
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2.47 ct Black Star Sapphire, 8.8 x 6.5 mm Oval Cut From Thailand, Photo A

2.47 ct Black Star Sapphire, 8.8 x 6.5 mm Oval Cut From Thailand

Star Sapphire

2.47ct1 pc
$ 44.46
8.8 x 6.5 mm
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0.69 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 5 x 5 mm, Photo A
Click for Product Video (668716)

0.69 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 5 x 5 mm

Emerald

0.69ct1 pc
$ 172.50
5 x 5 mm
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23.29 ct Square Hematite, 15.8 x 14.7 mm From Brazil, Photo A

23.29 ct Square Hematite, 15.8 x 14.7 mm From Brazil

Hematite

23.29ct1 pc
$ 22.80
15.8 x 14.7 mm
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8.51 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 24.7 x 6.8 mm, Photo A

8.51 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 24.7 x 6.8 mm

Tourmaline

8.51ct1 pc
$ 42.55
24.7 x 6.8 mm
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0.06 ct Green Diamond, 2.4 mm Diamond Cut From India, Photo A

0.06 ct Green Diamond, 2.4 mm Diamond Cut From India

Diamond

0.06ct1 pc
$ 60.00
2.4 mm
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71.31 ct Cushion Obsidian, 48.6 x 22.2 mm From Mexico, Photo A
Click for Product Video (447899)

71.31 ct Cushion Obsidian, 48.6 x 22.2 mm From Mexico

Obsidian

71.31ct1 pc
$ 78.44
48.6 x 22.2 mm
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21.34 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 20 x 15.2 mm, Photo A

21.34 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 20 x 15.2 mm

Topaz

21.34ct1 pc
$ 174.88
20 x 15.2 mm
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1.63 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6.2 x 6 mm, Photo A

1.63 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6.2 x 6 mm

Pyrope Garnet

1.63ct total2 pcs
$ 12.55
6.2 x 6 mm
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1.64 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm, Photo A

1.64 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm

Zircon

1.64ct total2 pcs
$ 9.81
6.1 x 4.2 mm
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5.79 ct Oval Cut Strawberry Quartz, 14.1 x 10 mm From Russia, Photo A

5.79 ct Oval Cut Strawberry Quartz, 14.1 x 10 mm From Russia

Strawberry Quartz

5.79ct1 pc
$ 35.04
14.1 x 10 mm
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30.34 ct Oval Tiger's Eye Matrix, 30.7 x 22.6 mm From Mexico, Photo A

30.34 ct Oval Tiger's Eye Matrix, 30.7 x 22.6 mm From Mexico

Tiger's Eye Matrix

30.34ct1 pc
$ 17.60
30.7 x 22.6 mm
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0.68 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.6 x 4.5 mm, Photo A

0.68 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 4.6 x 4.5 mm

Sapphire

0.68ct1 pc
$ 54.40
4.6 x 4.5 mm
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0.65 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.6 x 4.6 mm, Photo A

0.65 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.6 x 4.6 mm

Sapphire

0.65ct1 pc
$ 35.46
4.6 x 4.6 mm
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27.4 ct Fancy Fossil Coral, 24.7 x 11.5 mm From Indonesia, Photo A

27.4 ct Fancy Fossil Coral, 24.7 x 11.5 mm From Indonesia

Fossil Coral

27.40ct total2 pcs
$ 45.21
24.7 x 11.5 mm
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1.1 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 7.4 x 5.4 mm, Photo A

1.1 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 7.4 x 5.4 mm

Chrysoberyl

1.10ct1 pc
$ 128.71
7.4 x 5.4 mm
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2.5 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 6.2 mm, Photo A

2.5 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 6.2 mm

Hessonite Garnet

2.50ct1 pc
$ 49.50
8 x 6.2 mm
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4.23 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm, Photo A

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

Pyrope Garnet

4.23ct total10 pcs
$ 29.61
4 x 4 mm
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3.38 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 8.2 x 6.2 mm, Photo A

3.38 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 8.2 x 6.2 mm

Topaz

3.38ct total2 pcs
$ 23.66
8.2 x 6.2 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 oval shapes, facet cut and cabochon gems available now in 18 x13 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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