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| ID: 4885421 pcs |
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| 8.90 ct Jasper |
| 18.1 x 13 mm |
| $ 4.98 |
| Item in Stock |
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| ID: 4355681 pcs |
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| 10.12 ct Rutile Quartz |
| 18 x 13.1 mm |
| $ 25.10 |
| Item in Stock |
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| ID: 4883301 pcs |
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| 10.14 ct Jasper |
| 18 x 13 mm |
| $ 5.07 |
| Item in Stock |
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| ID: 4781901 pcs |
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| 8.80 ct Amethyst |
| 17.8 x 12.9 mm |
| $ 61.07 |
| Item in Stock |
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| ID: 4783081 pcs |
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| 8.34 ct Amethyst |
| 18 x 13 mm |
| $ 57.88 |
| Item in Stock |
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| ID: 4783071 pcs |
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| 8.08 ct Amethyst |
| 17.9 x 12.9 mm |
| $ 56.08 |
| Item in Stock |
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| ID: 4877711 pcs |
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| 10.41 ct Jasper |
| 18.2 x 13.1 mm |
| $ 5.83 |
| Item in Stock |
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| ID: 4879131 pcs |
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| 10.42 ct Jasper |
| 17.9 x 12.9 mm |
| $ 5.84 |
| Item in Stock |
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| ID: 4697201 pcs |
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| 15.88 ct Aquamarine |
| 18.2 x 13 mm |
| $ 133.55 |
| Item in Stock |
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| ID: 4695931 pcs |
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| 11.43 ct Serpentine |
| 17.8 x 13.1 mm |
| $ 24.00 |
| Item in Stock |
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| ID: 3145221 pcs |
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| 19.92 ct Rose Quartz |
| 18.3 x 13.2 mm |
| $ 23.90 |
| Item in Stock |
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| ID: 4783041 pcs |
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| 11.24 ct Amethyst |
| 18.1 x 13.2 mm |
| $ 78.01 |
| Item in Stock |
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| ID: 4877701 pcs |
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| 11.52 ct Jasper |
| 18.2 x 13.1 mm |
| $ 6.45 |
| Item in Stock |
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| ID: 3913931 pcs |
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| 7.72 ct Larimar |
| 17.9 x 12.8 mm |
| $ 92.64 |
| Item in Stock |
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| ID: 3905972 pcs |
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| 22.97 ct Tiger's Eye |
| 18.2 x 13.1 mm |
| $ 27.56 |
| Item in Stock |
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| ID: 4779271 pcs |
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| 10.75 ct Amethyst |
| 18 x 13.1 mm |
| $ 74.61 |
| Item in Stock |
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| ID: 4356411 pcs |
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| 10.32 ct Rutile Quartz |
| 17.9 x 13 mm |
| $ 25.59 |
| Item in Stock |
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| ID: 3906022 pcs |
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| 22.81 ct Tiger's Eye |
| 18 x 13 mm |
| $ 27.37 |
| Item in Stock |
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| ID: 4885572 pcs |
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| 21.86 ct Jasper |
| 18.1 x 12.9 mm |
| $ 12.24 |
| Item in Stock |
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| ID: 4781911 pcs |
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| 10.26 ct Amethyst |
| 18 x 13 mm |
| $ 71.20 |
| Item in Stock |
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| ID: 4781811 pcs |
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| 10.24 ct Amethyst |
| 18.2 x 13 mm |
| $ 71.07 |
| Item in Stock |
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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 Pear shapes, facet cut and cabochon gems available now in 18 x 13 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.
