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| ID: 3477042 pcs |
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| 16.77 ct Pietersite |
| 18.3 x 13.2 mm |
| $ 67.08 |
| Item in Stock |
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| ID: 3342521 pcs |
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| 21.24 ct Rose Quartz |
| 18.1 x 13.1 mm |
| $ 25.91 |
| Item in Stock |
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| ID: 4382952 pcs |
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| 25.08 ct Spinel |
| 18.2 x 13.1 mm |
| $ 75.24 |
| Item in Stock |
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| ID: 3287511 pcs |
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| 20.28 ct Rose Quartz |
| 18.3 x 13.2 mm |
| $ 24.34 |
| Item in Stock |
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| ID: 3468592 pcs |
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| 16.41 ct Charoite |
| 18.1 x 13.2 mm |
| $ 24.62 |
| Item in Stock |
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| ID: 3708371 pcs |
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| 12.30 ct Jasper |
| 18.2 x 13.2 mm |
| $ 12.30 |
| Item in Stock |
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| ID: 3717202 pcs |
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| 14.30 ct Pietersite |
| 18.2 x 13.2 mm |
| $ 57.20 |
| Item in Stock |
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| ID: 2735241 pcs |
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| 9.74 ct Howlite |
| 17.8 x 12.9 mm |
| $ 24.35 |
| Item in Stock |
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| ID: 3224361 pcs |
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| 9.15 ct Howlite |
| 18.1 x 13.1 mm |
| $ 22.88 |
| Item in Stock |
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| ID: 4564021 pcs |
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| 13.65 ct Pietersite |
| 18.2 x 13 mm |
| $ 31.80 |
| Item in Stock |
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| ID: 3707662 pcs |
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| 19.64 ct Jasper |
| 18.1 x 13.1 mm |
| $ 19.64 |
| Item in Stock |
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| ID: 3877761 pcs |
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| 15.97 ct Ametrine |
| 18 x 12.9 mm |
| $ 111.79 |
| Item in Stock |
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| ID: 4564032 pcs |
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| 25.68 ct Pietersite |
| 18.2 x 13.1 mm |
| $ 59.83 |
| Item in Stock |
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| ID: 3707602 pcs |
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| 23.48 ct Jasper |
| 18 x 13.2 mm |
| $ 23.48 |
| Item in Stock |
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| ID: 4573162 pcs |
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| 24.17 ct Pietersite |
| 18 x 13.2 mm |
| $ 56.32 |
| Item in Stock |
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| ID: 1968551 pcs |
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| 13.35 ct Ruby-Zoisite |
| 18.2 x 13 mm |
| $ 40.05 |
| Item in Stock |
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| ID: 3641101 pcs |
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| 7.89 ct Jasper |
| 18 x 13 mm |
| $ 15.78 |
| Item in Stock |
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| ID: 3342921 pcs |
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| 16.81 ct Rose Quartz |
| 18.3 x 13.2 mm |
| $ 20.51 |
| Item in Stock |
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| ID: 4589261 pcs |
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| 9.04 ct Lapis Lazuli |
| 17.9 x 13 mm |
| $ 9.04 |
| Item in Stock |
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| ID: 3707622 pcs |
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| 20.66 ct Jasper |
| 17.9 x 13.2 mm |
| $ 20.66 |
| Item in Stock |
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| ID: 3342961 pcs |
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| 16.25 ct Rose Quartz |
| 18 x 13.3 mm |
| $ 19.82 |
| 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 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.
