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| ID: 4356371 pcs |
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| 13.21 ct Rutile Quartz |
| 18.2 x 13.2 mm |
| $ 32.76 |
| 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: 2543261 pcs |
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| 14.06 ct Chrysoprase |
| 18.1 x 13.3 mm |
| $ 98.42 |
| Item in Stock |
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| ID: 4356361 pcs |
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| 8.66 ct Rutile Quartz |
| 17.8 x 13 mm |
| $ 21.48 |
| 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: 4074451 pcs |
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| 15.71 ct Maw-Sit-Sit |
| 18 x 13 mm |
| $ 31.42 |
| Item in Stock |
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| ID: 4598281 pcs |
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| 10.69 ct Amethyst |
| 18.1 x 13 mm |
| $ 74.83 |
| Item in Stock |
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| ID: 4601071 pcs |
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| 10.48 ct Amethyst |
| 18.1 x 13.1 mm |
| $ 73.36 |
| Item in Stock |
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| ID: 3914241 pcs |
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| 12.51 ct Larimar |
| 18.1 x 13 mm |
| $ 150.12 |
| Item in Stock |
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| ID: 4585181 pcs |
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| 10.28 ct Amethyst |
| 18.2 x 13.1 mm |
| $ 71.96 |
| Item in Stock |
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| ID: 4587031 pcs |
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| 10.19 ct Amethyst |
| 17.9 x 12.9 mm |
| $ 71.33 |
| Item in Stock |
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| ID: 3905982 pcs |
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| 22.63 ct Tiger's Eye |
| 18 x 12.9 mm |
| $ 27.16 |
| Item in Stock |
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| ID: 4584891 pcs |
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| 9.02 ct Chalcedony |
| 18.1 x 13.1 mm |
| $ 9.02 |
| Item in Stock |
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| ID: 4600351 pcs |
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| 10.03 ct Amethyst |
| 18.1 x 13.1 mm |
| $ 70.21 |
| Item in Stock |
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| ID: 4355671 pcs |
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| 11.61 ct Rutile Quartz |
| 18.1 x 13.3 mm |
| $ 28.79 |
| Item in Stock |
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| ID: 3906032 pcs |
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| 22.12 ct Tiger's Eye |
| 18 x 12.9 mm |
| $ 26.54 |
| Item in Stock |
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| ID: 4587001 pcs |
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| 9.91 ct Amethyst |
| 18 x 13 mm |
| $ 69.37 |
| Item in Stock |
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| ID: 4601081 pcs |
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| 9.88 ct Amethyst |
| 18 x 12.9 mm |
| $ 69.16 |
| Item in Stock |
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| ID: 4585161 pcs |
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| 8.77 ct Amethyst |
| 18.1 x 12.8 mm |
| $ 61.39 |
| Item in Stock |
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| ID: 4586971 pcs |
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| 9.86 ct Amethyst |
| 17.9 x 12.9 mm |
| $ 69.02 |
| Item in Stock |
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| ID: 4600371 pcs |
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| 9.84 ct Amethyst |
| 18.1 x 13 mm |
| $ 68.88 |
| 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.
