18 mm Round Gemstones: Natural Rubies, Sapphires, Garnets, Emeralds, Tourmalines, Amethysts in 18mm Round
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Explore our stunning collection of 18 mm round gemstones, featuring a variety of 18 mm gems and 18 mm stones with exceptional carat weight. Whether you're looking for round garnets, round sapphires, round rubies, or round emeralds, our 18 mm round cuts offer unparalleled brilliance and beauty, perfect for all your fine jewelry creations. 2. Dive into the world of 18 mm round gemstones, where you'll find a range of 18 mm round stones, gems 18 mm, and expertly crafted round brilliant cuts. Our collection includes premium 18 mm round diamonds, round sapphires, round rubies, and round emeralds, all designed to deliver stunning clarity, color, and carat weight for your jewelry collection. |
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Bi-color
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Black
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Blue 18 mm Round Gemstones
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Brown 18 mm Round Gemstones
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Golden
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Gray 18 mm Round Gemstones
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Green 18 mm Round Gemstones
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Multicolor 18 mm Round Gemstones
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Orange
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Pink
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Purple
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Red
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Turquoise
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Violet 18 mm Round Gemstones
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White 18 mm Round Gemstones
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Yellow 18 mm Round Gemstones
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| ID: | 602194 |
| Weight: | 15.94ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 77.44 |
| Item in Stock | |
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| ID: | 625471 |
| Weight: | 16.42ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 86.90 |
| Item in Stock | |
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| ID: | 598911 |
| Weight: | 16.29ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 78.05 |
| Item in Stock | |
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| ID: | 714392 |
| Weight: | 27.45ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 247.05 |
| Item in Stock | |
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| ID: | 671202 |
| Weight: | 15.26ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 32.81 |
| Item in Stock | |
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| ID: | 503802 |
| Weight: | 17.43ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 69.02 |
| Item in Stock | |
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| ID: | 406641 |
| Weight: | 24.65ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 59.16 |
| Item in Stock | |
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| ID: | 658420 |
| Weight: | 10.45ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 37.62 |
| Item in Stock | |
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| ID: | 717023 |
| Weight: | 15.97ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 30.47 |
| Item in Stock | |
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| ID: | 491705 |
| Weight: | 48.28ct (total) |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 56.72 |
| Item in Stock | |
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| ID: | 712831 |
| Weight: | 18.67ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 156.83 |
| Item in Stock | |
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| ID: | 406636 |
| Weight: | 21.98ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 58.03 |
| Item in Stock | |
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| ID: | 712390 |
| Weight: | 19.21ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VS |
| Content: | 1 pc |
| Price: | $ 161.36 |
| Item in Stock | |
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| ID: | 491707 |
| Weight: | 58.13ct (total) |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 68.29 |
| Item in Stock | |
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| ID: | 711140 |
| Weight: | 18.92ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 158.93 |
| Item in Stock | |
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| ID: | 712833 |
| Weight: | 19.88ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 166.99 |
| Item in Stock | |
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| ID: | 602847 |
| Weight: | 14.85ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 71.94 |
| Item in Stock | |
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| ID: | 427977 |
| Weight: | 15.19ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 70.18 |
| Item in Stock | |
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| ID: | 371914 |
| Weight: | 18.40ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 109.30 |
| Item in Stock | |
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| ID: | 427976 |
| Weight: | 15.09ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 69.72 |
| Item in Stock | |
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| ID: | 491702 |
| Weight: | 48.88ct (total) |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 57.42 |
| Item in Stock | |
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| ID: | 712391 |
| Weight: | 18.19ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VS |
| Content: | 1 pc |
| Price: | $ 152.80 |
| Item in Stock | |
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| ID: | 711146 |
| Weight: | 18.08ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 151.87 |
| Item in Stock | |
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| ID: | 711137 |
| Weight: | 18.58ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 156.07 |
| Item in Stock | |
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| ID: | 711022 |
| Weight: | 17.29ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 145.24 |
| Item in Stock | |
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| ID: | 711143 |
| Weight: | 19.78ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 166.15 |
| Item in Stock | |
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| ID: | 712832 |
| Weight: | 19.76ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 165.98 |
| Item in Stock | |
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| ID: | 712395 |
| Weight: | 18.88ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 158.59 |
| Item in Stock | |
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| ID: | 711630 |
| Weight: | 18.89ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 158.68 |
| Item in Stock | |
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| ID: | 711023 |
| Weight: | 19.39ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 162.88 |
| Item in Stock | |
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| ID: | 721363 |
| Weight: | 24.27ct |
| Size: | 19 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 29.12 |
| Item in Stock | |
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| ID: | 391653 |
| Weight: | 29.41ct (total) |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 83.46 |
| Item in Stock | |
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| ID: | 650679 |
| Weight: | 11.67ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 32.90 |
| Item in Stock | |
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| ID: | 669080 |
| Weight: | 17.63ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Transparent |
| Content: | 1 pc |
| Price: | $ 380.81 |
| Item in Stock | |
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| ID: | 602734 |
| Weight: | 14.35ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 69.52 |
| Item in Stock | |
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| ID: | 712836 |
| Weight: | 19.33ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 162.37 |
| Item in Stock | |
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| ID: | 406640 |
| Weight: | 23.89ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 63.07 |
| Item in Stock | |
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| ID: | 687678 |
| Weight: | 12.37ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 36.52 |
| Item in Stock | |
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| ID: | 391643 |
| Weight: | 34.12ct (total) |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 2 pcs |
| Price: | $ 96.84 |
| Item in Stock | |
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| ID: | 552037 |
| Weight: | 11.91ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 31.44 |
| Item in Stock | |
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| ID: | 406635 |
| Weight: | 23.98ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 63.31 |
| Item in Stock | |
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| ID: | 711029 |
| Weight: | 19.14ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 160.78 |
| Item in Stock | |
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| ID: | 712389 |
| Weight: | 19.60ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 164.64 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 601427 |
| Weight: | 15.46ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS-VS |
| Content: | 1 pc |
| Price: | $ 75.10 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 711030 |
| Weight: | 18.76ct |
| Size: | 18 mm (calibrated) |
| Clarity: | VVS |
| Content: | 1 pc |
| Price: | $ 157.58 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 717165 |
| Weight: | 13.25ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 25.28 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 564824 |
| Weight: | 13.11ct |
| Size: | 18 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 51.91 |
| Item in Stock | |
| More Options & Item Details | |
GemSelect Certified Store Reviews
GemSelect: Over 18 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
Had no difficulty with the website. The only difficulty I had today was making the choice of what I wanted to purchase. There are just so many delicious stones to choose from!!
Posted By Desertchick in July, 2024
Source: Bizrate
Overall Rating -> 10
Easy and convenient
Posted By Butch in September, 2024
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Overall Rating -> 9 
I did not have any problems
Posted By Clilrichard in January, 2025
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Overall Rating -> 10
It was very good and concise.
Posted By Whydothey in August, 2024
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Overall Rating -> 10
I love the quality, package and info of your gems.
Posted By Diana in April, 2025
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Overall Rating -> 10
Good products
Posted By Brave in October, 2024
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Overall Rating -> 10
This was a great time as always. The only problem I had was deciding between all the beautiful and affordable stones that met my requirements. I love shopping for sapphires!
Posted By Phoenix in August, 2024
Source: Bizrate
Overall Rating -> 8 
The website was nice and I bought some gems
Posted By Jay in December, 2024
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Overall Rating -> 10
GemSelect website simple to use. I recommend it to non-trade clients looking for gems.
Posted By GemJocky in July, 2024
Source: Bizrate
