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20 mm Round Gemstones: Topaz, Opals, Garnets, Sapphires, Rubies, Calibrated 20 mm Round Gems

20 mm Round Gemstones: Topaz, Opals, Garnets, Sapphires, Rubies, Calibrated 20 mm Round Gems

Welcome to our 20 mm round gemstones collection, featuring a stunning variety of Garnets, Sapphires, Rubies, and Emeralds. Whether you're looking for 20 mm round gems for jewelry making or a special project, our calibrated stones are precision-cut to perfection. Explore our selection of Amethysts, Topaz, Opals, and Aquamarines, all available in a brilliant round cut. Find the perfect 20 mm round jewels to elevate your designs today!

20 mm Round Gemstones Weight
20 mm Round Gemstones Size
20 mm Round Gemstones Clarity
20 mm Round Gemstones Price

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ID: 597474
Weight: 38.51ct
Size: 20 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 84.72
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ID: 483951
Weight: 25.73ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 37.70
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ID: 692710
Weight: 25.91ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 181.37
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ID: 483946
Weight: 28.16ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 41.27
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ID: 692707
Weight: 29.03ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 203.21
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ID: 473135
Weight: 25.49ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 24.56
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ID: 605469
Weight: 25.03ct
Size: 20 mm (calibrated)
Clarity: VS
Content: 1 pc
Price: $ 105.73
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ID: 483947
Weight: 24.56ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 29.99
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ID: 329090
Weight: 36.10ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 50.83
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ID: 692709
Weight: 23.46ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 164.22
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ID: 715763
Weight: 25.46ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 244.42
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ID: 692711
Weight: 22.72ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 190.85
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ID: 621016
Weight: 25.42ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 67.10
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ID: 692517
Weight: 25.64ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 215.38
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ID: 716113
Weight: 23.25ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 223.20
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ID: 692470
Weight: 23.66ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 198.74
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ID: 491708
Weight: 66.67ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 78.32
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ID: 483944
Weight: 23.68ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 34.69
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ID: 692708
Weight: 26.75ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 224.70
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ID: 473128
Weight: 19.81ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 15.91
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ID: 693090
Weight: 26.02ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 218.57
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ID: 483845
Weight: 24.31ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 35.62
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ID: 491572
Weight: 65.25ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 76.66
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ID: 693081
Weight: 26.13ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 219.49
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ID: 618767
Weight: 25.78ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 68.06
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ID: 692516
Weight: 22.21ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 186.56
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ID: 692349
Weight: 26.41ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 221.84
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ID: 546989
Weight: 32.21ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 25.51
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ID: 491579
Weight: 65.53ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 76.98
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ID: 329233
Weight: 35.20ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 59.48
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ID: 692702
Weight: 26.56ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 223.10
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ID: 491581
Weight: 55.11ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 64.75
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ID: 476799
Weight: 32.74ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 129.65
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ID: 329082
Weight: 37.62ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 57.78
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ID: 329230
Weight: 36.73ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 62.05
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ID: 473131
Weight: 23.89ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 23.02
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ID: 692469
Weight: 25.07ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 210.59
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ID: 692703
Weight: 24.28ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 203.95
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ID: 693087
Weight: 24.55ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 206.22
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ID: 483838
Weight: 23.26ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 34.08
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ID: 692351
Weight: 26.62ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 223.61
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ID: 618047
Weight: 25.88ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 68.33
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ID: 693084
Weight: 26.75ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 224.70
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ID: 497800
Weight: 33.27ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 36.90
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ID: 618052
Weight: 26.25ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 69.30
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ID: 724826
Weight: 34.68ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 39.54
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ID: 693089
Weight: 23.77ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 199.67
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ID: 497796
Weight: 33.63ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 37.30
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ID: 692701
Weight: 25.66ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 215.54
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ID: 716435
Weight: 25.41ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 243.94
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ID: 692518
Weight: 23.92ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 200.93
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ID: 692468
Weight: 24.79ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 208.24
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ID: 618053
Weight: 23.17ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 61.16
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ID: 645796
Weight: 17.64ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 9.95
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ID: 619775
Weight: 25.40ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 67.06
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ID: 618048
Weight: 26.54ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 70.07
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ID: 692472
Weight: 23.32ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 195.89
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ID: 693085
Weight: 24.86ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 208.82
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ID: 693086
Weight: 26.15ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 219.66
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ID: 692700
Weight: 25.83ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 216.97
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FAQs

What types of gemstones are available in 20 mm round sizes?

We offer a wide variety of 20 mm round gemstones, including Diamonds, Sapphires, Rubies, Emeralds, Amethysts, Topaz, Opals, Aquamarines, Citrines, and Garnets. Each stone is carefully calibrated for consistent sizing and quality.

Are 20 mm round gemstones suitable for jewelry making?

Yes, 20 mm round gemstones are perfect for jewelry making. Their size and shape make them ideal for rings, pendants, earrings, and bracelets. They are also commonly used in halo or pavé settings for added brilliance.

What is a calibrated 20 mm round gemstone?

A calibrated 20 mm round gemstone is pre-cut to a specific size (20 mm in diameter) to ensure uniformity. This makes them easier to set into jewelry designs and ensures a consistent look across multiple pieces.

Can I find 20 mm round gemstones in a brilliant cut?

Absolutely! Many of our 20 mm round gemstones, including Diamonds, Sapphires, and Rubies, are available in a brilliant round cut. This cut maximizes the stone's sparkle and light reflection.

Are 20 mm round gemstones available in both precious and semi-precious varieties?

Yes, our collection includes both precious gemstones like Diamonds, Sapphires, Rubies, and Emeralds, as well as semi-precious stones such as Amethysts, Topaz, Opals, Aquamarines, Citrines, and Garnets.

How do I care for jewelry made with 20 mm round gemstones?

To maintain the beauty of your 20 mm round gemstones, clean them regularly with a soft cloth and mild soapy water. Avoid exposing them to harsh chemicals or extreme temperatures. Store them separately to prevent scratches.

Can 20 mm round gemstones be customized for specific designs?

Yes, our 20 mm round gemstones can be customized to fit your unique jewelry designs. Whether you need a specific type of stone or a particular setting, we can help you create the perfect piece.

Are 20 mm round gemstones a good choice for statement jewelry?

Absolutely! The size and brilliance of 20 mm round gemstones make them an excellent choice for creating bold, eye-catching statement pieces like cocktail rings, pendants, or earrings.

Do you offer certifications for 20 mm round gemstones?

Yes, many of our 20 mm round gemstones come with certifications from reputable gemological laboratories, ensuring their quality and authenticity.

Where can I buy 20 mm round gemstones?

You can purchase our 20 mm round gemstones directly from our online store. We offer a wide selection of calibrated stones, including Diamonds, Sapphires, Rubies, Emeralds, and more, all cut to perfection for your jewelry needs.

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

Very good Hoping you will increase your inventory especially in the 6mm Thanks

Posted By Ibie in February, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am never let down by GemSelect. I love that you get the exact stone you want. Shipping is always in a few days. I have spread the word about GemSelect on social media jewelry creating groups that I attend. This sapphire is going to make one gorgeous ring

Posted By Desertchick in April, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
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Overall Rating -> 10 star ratings

I enjoy doing buisness with GemSelect. It is always a pleasure and you get what you ordered!

Posted By Ballpark in December, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Very good Hoping you will increase your inventory especially in the 6mmThanks

Posted By Ibie in February, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I was looking for a small gift for a friend- the process is the same as every other time and was very simple, and she even got her gift early! On the downside, there's no way to easily keep track of multiple Shipping Addresses, so if I want to send a gift to Friend A and to Friend B, I have to overwrite everything and it's a fair bit clunky in that regard.

Posted By Jezzi in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I like the site, it's easy to navigate. There are sometimes items I'm looking for that aren't there, but mostly I can find what I need.

Posted By Nate in March, 2025
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Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
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Overall Rating -> 10 star ratings

Appreciated the selection. Jadeite is hard to find under $100. Website has alot of variety.

Posted By Jess in February, 2025
Source: Bizrate
Enlarged Gemstone Image