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Buy Round Shape 12 mm Gems

Round Shape 12 mm Gems Weight
Round Shape 12 mm Gems Size
Round Shape 12 mm Gems Clarity
Round Shape 12 mm Gems Price

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ID: 501408
Weight: 6.39ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 49.20
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ID: 608841
Weight: 11.12ct (total)
Size: 12 mm (calibrated)
Clarity: VVS
Content: 2 pcs
Price: $ 61.16
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ID: 567740
Weight: 6.99ct
Size: 12 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 17.61
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ID: 360548
Weight: 7.56ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 39.91
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ID: 475302
Weight: 7.13ct
Size: 12 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 59.89
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ID: 360617
Weight: 8.34ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 36.70
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ID: 505435
Weight: 6.50ct
Size: 12 mm (calibrated)
Clarity: Opaque
Price: $ 89.48
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ID: 601422
Weight: 5.13ct
Size: 12 mm (calibrated)
Clarity: VS
Content: 1 pc
Price: $ 24.92
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ID: 497338
Weight: 5.68ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 31.24
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ID: 608838
Weight: 10.60ct (total)
Size: 12 mm (calibrated)
Clarity: VVS
Content: 2 pcs
Price: $ 58.30
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ID: 438431
Weight: 15.82ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 62.65
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ID: 501048
Weight: 5.71ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 52.76
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ID: 338281
Weight: 13.62ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 224.73
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ID: 625469
Weight: 5.53ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 29.28
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ID: 438379
Weight: 13.54ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 53.62
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ID: 601512
Weight: 4.90ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 23.80
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ID: 505527
Weight: 6.82ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 85.34
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ID: 526454
Weight: avg. 12.53 ct / each
Size: 12 mm (calibrated)
Clarity: Opaque
Price: $ 15.16
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ID: 566715
Weight: 5.59ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 16.90
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ID: 602738
Weight: 5.16ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 25.00
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ID: 438378
Weight: 13.79ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 54.61
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ID: 351467
Weight: 9.88ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 43.47
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ID: 422964
Weight: 25.67ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 27.11
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ID: 438438
Weight: 14.30ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 56.63
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ID: 566966
Weight: 5.36ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 16.20
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ID: 566445
Weight: 24.43ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 18.38
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ID: 338290
Weight: 12.76ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 191.40
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ID: 636236
Weight: 5.46ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 45.86
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ID: 635495
Weight: 5.96ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 50.06
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ID: 598886
Weight: 5.53ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 22.08
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ID: 655865
Weight: 6.66ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 10.39
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ID: 464013
Weight: 5.19ct
Size: 12 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 10.28
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ID: 602732
Weight: 5.24ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 25.38
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ID: 618962
Weight: 5.04ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 25.48
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ID: 497339
Weight: 5.58ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 36.83
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ID: 721522
Weight: 9.53ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 11.44
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ID: 607808
Weight: 5.35ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 35.32
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ID: 463980
Weight: 4.95ct
Size: 12 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 9.80
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ID: 378274
Weight: 11.99ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 47.48
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ID: 612075
Weight: 5.58ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 22.09
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ID: 598888
Weight: 5.66ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 27.13
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ID: 541494
Weight: 6.50ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 38.70
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ID: 497340
Weight: 4.46ct
Size: 12 mm (calibrated)
Clarity: VS
Content: 1 pc
Price: $ 29.44
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ID: 598890
Weight: 6.06ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 29.04
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ID: 503794
Weight: 4.20ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 16.63
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ID: 700894
Weight: 11.68ct (total)
Size: 12 mm (calibrated)
Clarity: VS
Content: 2 pcs
Price: $ 42.05
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ID: 338211
Weight: 13.34ct
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 263.34
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ID: 438369
Weight: 13.97ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 55.32
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ID: 448998
Weight: 6.66ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 21.98
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ID: 378276
Weight: 14.84ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 58.76
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ID: 438375
Weight: 15.39ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 60.95
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ID: 369510
Weight: 8.36ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 35.76
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ID: 565642
Weight: 24.04ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 15.07
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ID: 548375
Weight: 14.65ct (total)
Size: 12 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 55.07
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ID: 501046
Weight: 5.65ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 52.21
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ID: 600305
Weight: 6.24ct
Size: 12 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 29.82
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ID: 688417
Weight: 7.55ct
Size: 12 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 22.10
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ID: 495385
Weight: 6.50ct
Size: 12 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 42.90
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ID: 470008
Weight: 11.38ct
Size: 12 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 15.78
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ID: 503382
Weight: 6.21ct
Size: 12 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 40.44
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GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Helpselect accomplished all personal growth goals

Posted By Mike in October, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

very good

Posted By Son Gift in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was very good and concise.

Posted By Whydothey in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Always find more niche sizes/shapes as my unconventional designs require from this website. Recommending to fellow designers in the creative atmosphere on the usual, specially due to the quality and certification of gems.

Posted By Sina in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've made several purchases through GemSelect in the past, although not within the last six months. Their gems are always beautiful and I have never had an issue with their prices or their stones. Even when I'm not buying, I love scrolling through their website, which is very user friendly. I especially appreciate being able to change the listing order to your own liking, such as most to least expensive, largest to smallest, etc. As with most online orders, however, I think the shipping charges are not commensurate with the actual weight of the items shipped.

Posted By DrLHS in November, 2024
Source: Bizrate

Overall Rating -> 9 star ratings

the gems were smaller than I thought but I was at fault for not reading the complete discrimination

Posted By Tim in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I searched for the size, dimensions and quality of the stones I was looking for and then compared and ordered.

Posted By Tim in March, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

When I need a specific stone, gem select is my go to shop. Always a good experience and a great product.

Posted By LeAnn in April, 2025
Source: Bizrate

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 Round shapes, facet cut and cabochon gems available now in 12 mm diameter 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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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Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Helpselect accomplished all personal growth goals

Posted By Mike in October, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

very good

Posted By Son Gift in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was very good and concise.

Posted By Whydothey in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Always find more niche sizes/shapes as my unconventional designs require from this website. Recommending to fellow designers in the creative atmosphere on the usual, specially due to the quality and certification of gems.

Posted By Sina in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've made several purchases through GemSelect in the past, although not within the last six months. Their gems are always beautiful and I have never had an issue with their prices or their stones. Even when I'm not buying, I love scrolling through their website, which is very user friendly. I especially appreciate being able to change the listing order to your own liking, such as most to least expensive, largest to smallest, etc. As with most online orders, however, I think the shipping charges are not commensurate with the actual weight of the items shipped.

Posted By DrLHS in November, 2024
Source: Bizrate

Overall Rating -> 9 star ratings

the gems were smaller than I thought but I was at fault for not reading the complete discrimination

Posted By Tim in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I searched for the size, dimensions and quality of the stones I was looking for and then compared and ordered.

Posted By Tim in March, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

When I need a specific stone, gem select is my go to shop. Always a good experience and a great product.

Posted By LeAnn in April, 2025
Source: Bizrate
Enlarged Gemstone Image