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Buy Oval Shape 18x13 mm Gems

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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (203): Oval Shape 18x13 mm Gems Clear All
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Green Tourmaline Gem - 14ct Oval Facet (ID: 412591)

Oval Green Tourmaline

14ct
18.5 x 13.3 mm
$ 770.55
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2 pcs
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Multicolor Jasper Gem - 12.6ct Oval Cabochon (ID: 488554)

Oval Multicolor Jasper

12.56 ct (total 25.12ctw)
18.1 x 13.1 mm
$ 14.07
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Red Strawberry Quartz Gem - 13.6ct Oval Facet (ID: 472287)

Oval Red Strawberry Quartz

13.6ct
17.8 x 13.4 mm
$ 95.20
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Green Prehnite Gem - 16ct Carved Oval Cabochon (ID: 474443)

Oval Green Prehnite

16ct
17.5 x 13.4 mm
$ 33.68
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2 pcs
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Green Seraphinite Gem - 9.6ct Oval Cabochon (ID: 328645)

Oval Green Seraphinite

9.56 ct (total 19.12ctw)
18.1 x 13.2 mm
$ 34.42
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Black Spinel Gem - 13.4ct Oval Rose-Cut (ID: 438290)

Oval Black Spinel

13.44 ct (total 26.87ctw)
17.9 x 13 mm
$ 80.61
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Multicolor Opal Gem - 9.7ct Oval Cabochon (ID: 462196)

Oval Multicolor Opal

9.7ct
18.4 x 13.5 mm
$ 388.91
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Bluish Green Fluorite Gem - 12.1ct Oval Sugarloaf Cabochon (ID: 472027)

Oval Green Fluorite

12.1ct
18.1 x 12.9 mm
$ 12.05
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Light Blue Aquamarine Gem - 13.3ct Oval Cabochon (ID: 469725)

Oval Blue Aquamarine

13.3ct
17.8 x 13.1 mm
$ 112.11
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Multicolor Pietersite Gem - 7.7ct Oval Cabochon (ID: 347717)

Oval Multicolor Pietersite

7.7ct
18.1 x 13.2 mm
$ 30.72
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Red Strawberry Quartz Gem - 10.4ct Oval Facet (ID: 471617)

Oval Red Strawberry Quartz

10.4ct
17.5 x 13.3 mm
$ 72.87
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Pink Rose Quartz Gem - 15.6ct Oval Cabochon (ID: 334244)

Oval Pink Rose Quartz

15.6ct
17.9 x 13.1 mm
$ 19.01
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Multicolor Jasper Gem - 11.8ct Oval Cabochon (ID: 476748)

Oval Multicolor Jasper

11.8ct
18 x 13.2 mm
$ 7.52
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2 pcs
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Multicolor Fossil Coral Gem - 10.3ct Oval Cabochon (ID: 482204)

Oval Multicolor Fossil Coral

10.27 ct (total 20.54ctw)
18.1 x 12.8 mm
$ 20.13
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Multicolor Cat's Eye Opal Gem - 10.7ct Oval Cabochon (ID: 494492)

Oval Multicolor Cat's Eye Opal

10.7ct
18.5 x 12.9 mm
$ 21.46
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2 pcs
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Multicolor Pietersite Gem - 8.1ct Oval Cabochon (ID: 371838)

Oval Multicolor Pietersite

8.13 ct (total 16.26ctw)
18 x 13.2 mm
$ 65.04
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Multicolor Jasper Gem - 12.3ct Oval Cabochon (ID: 476698)

Oval Multicolor Jasper

12.3ct
18 x 13.1 mm
$ 7.86
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Multicolor Ruby-Zoisite Gem - 19.8ct Oval Cabochon (ID: 266276)

Oval Multicolor Ruby-Zoisite

19.8ct
18.2 x 12.9 mm
$ 54.31
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2 pcs
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Multicolor Jasper Gem - 11.1ct Oval Cabochon (ID: 370763)

Oval Multicolor Jasper

11.09 ct (total 22.17ctw)
18.1 x 13.1 mm
$ 22.17
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Bluish Green Grandidierite Gem - 10.8ct Oval Cabochon (ID: 471788)

Oval Green Grandidierite

10.8ct
17.4 x 12.5 mm
$ 3,237.00
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Green Fluorite Gem - 14.8ct Oval Cabochon (ID: 475464)

Oval Green Fluorite

14.8ct
17.3 x 13.2 mm
$ 14.83
Item in Stock
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Oval Shape 18x13 mm Gems
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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I was very happy on the quality of the gemstones I recieved from GemSelect, I will deffinetly buy again.
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Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.
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Overall Rating -> 9 star ratings
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Posted By BO in January, 2019
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Overall Rating -> 10 star ratings
As Always never disappointed in any gemstone I purchase from this site. I have never had a problem. Thank-You Gemselect for offering such a comprehensive variety . I will continue to order from this site.
Posted By Brian in January, 2019
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart