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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (224): Oval Shape 16x12 mm Gems Clear All
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9.6ct Oval Concave Cut Purplish Pink Mystic Topaz Gem (ID: 483039)
9.59 ct Mystic Topaz
16 x 12.2 mm
$ 76.72
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1 pc
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10.5ct Oval Facet Violet Blue Tanzanite Gem (ID: 378198)
10.52 ct Tanzanite
16.4 x 11.6 mm
$ 5,260.50
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13.8ct Oval Cabochon Cream Star Moonstone Gem (ID: 403196)
13.75 ct Star Moonstone
15.9 x 11.8 mm
$ 48.54
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8.8ct Oval Concave Cut Purplish Pink Mystic Topaz Gem (ID: 483015)
8.82 ct Mystic Topaz
16 x 12.1 mm
$ 70.56
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13.7ct Oval Facet Pink Kunzite Gem (ID: 405974)
13.65 ct Kunzite
15.6 x 11.8 mm
$ 341.25
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2 pcs
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11.5ct Oval Rose-Cut Black Spinel Gem (ID: 426616)
11.46 ct (total 22.91ctw) Spinel
16.2 x 12.2 mm
$ 80.18
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9.8ct Oval Cabochon Multicolor Jasper Gem (ID: 476743)
9.78 ct Jasper
15.9 x 12 mm
$ 6.26
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7.2ct Oval Cabochon Cream Moonstone Gem (ID: 446002)
7.18 ct Moonstone
16.4 x 12 mm
$ 14.43
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13.3ct Oval Cabochon Orange Red Carnelian Gem (ID: 504078)
13.25 ct Carnelian
16.1 x 12.2 mm
$ 53.00
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10.9ct Oval Cabochon Green Serpentine Gem (ID: 469472)
10.89 ct Serpentine
16 x 12.1 mm
$ 22.87
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9.6ct Oval Cabochon Light Blue Aquamarine Gem (ID: 414322)
9.63 ct Aquamarine
16.2 x 11.6 mm
$ 77.04
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15.5ct Oval Cabochon Blue Lapis Lazuli Gem (ID: 499152)
15.50 ct Lapis Lazuli
16.5 x 12.4 mm
$ 24.34
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10ct Oval Cabochon Green Maw-Sit-Sit Gem (ID: 477660)
9.97 ct Maw-Sit-Sit
15.8 x 11.6 mm
$ 21.24
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8.7ct Oval Cabochon Green Serpentine Gem (ID: 469774)
8.66 ct Serpentine
16.2 x 12.1 mm
$ 18.19
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9.8ct Oval Facet Spotted Green Bloodstone Gem (ID: 482764)
9.75 ct Bloodstone
15.7 x 12.4 mm
$ 17.55
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8.7ct Oval Cabochon Green Serpentine Gem (ID: 469595)
8.65 ct Serpentine
16.1 x 12.1 mm
$ 17.96
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7.1ct Oval Cabochon Light Blue Aquamarine Gem (ID: 414488)
7.05 ct Aquamarine
16.3 x 11.7 mm
$ 56.40
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9.3ct Oval Cabochon Light Blue Aquamarine Gem (ID: 414383)
9.33 ct Aquamarine
16.3 x 12.1 mm
$ 74.64
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10.7ct Oval Cabochon Green Fluorite Gem (ID: 475633)
10.73 ct Fluorite
15.8 x 12.3 mm
$ 10.73
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8.2ct Oval Cabochon Green Serpentine Gem (ID: 469591)
8.23 ct Serpentine
15.8 x 11.7 mm
$ 17.28
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7.5ct Oval Cabochon Green Serpentine Gem (ID: 469771)
7.45 ct Serpentine
16.2 x 11.8 mm
$ 15.65
Item in Stock
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Oval Shape 16x12 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 16 x 12 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.

Certified Customer Reviews
Overall Rating -> 10 star ratings
Colors and qualities of gems are very well represented online. Easy to use website. Great selections!
Posted By in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This was my second purchase from GemSelect and definitely won’t be my last! They have a very wide variety of gems and you can always find what you are looking for with ease and the prices are very good.
Posted By Jill in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Loved the wide selection of product
Posted By Miki in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
finally bought the last rock to complete my ring idea; needed another white one after giving the big diamond to my daughter. a diamond that size is out of my retired-school-teacher budget, so i bought a white zircon. went back to the same place that i got my loose sapphire-- great selection, good prices, good delivery!
Posted By Ptcmom in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I'm always real pleased with this website, I don't think there is much you could do to make it any better. I wish the shipping charges were lower, but it is understandable.
Posted By Spinch13 in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This is a site that sources valuable and genuine stones forms around the world, with and honest and descriptive sections, as well as specs, and the option to have the gemstone collection one might purchased—certified! Price ranges vary, but are always affordable and always worth it, whether it’s a gift, or for a personal business.
Posted By Bradley in November, 2018
Source: Bizrate
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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