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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
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20 mm Round Gemstones Price

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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: 483946
Weight: 28.16ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 41.27
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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: 329090
Weight: 36.10ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 50.83
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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: 483947
Weight: 24.56ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 29.99
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ID: 483836
Weight: 24.39ct
Size: 20 mm (calibrated)
Clarity: Translucent
Price: $ 35.74
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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: 605469
Weight: 25.03ct
Size: 20 mm (calibrated)
Clarity: VS
Content: 1 pc
Price: $ 105.73
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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: 693088
Weight: 26.00ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 218.40
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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: 692708
Weight: 26.75ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 224.70
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ID: 492431
Weight: 14.05ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 52.85
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ID: 621014
Weight: 24.86ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 65.63
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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: 715348
Weight: 26.47ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 254.11
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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: 692700
Weight: 25.83ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 216.97
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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: 618767
Weight: 25.78ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 68.06
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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: 692470
Weight: 23.66ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 198.74
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ID: 693083
Weight: 25.75ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 216.30
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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: 473131
Weight: 23.89ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 23.02
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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: 491708
Weight: 66.67ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 78.32
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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: 692516
Weight: 22.21ct
Size: 20 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 186.56
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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: 497796
Weight: 33.63ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 37.30
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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: 476799
Weight: 32.74ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 129.65
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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: 693087
Weight: 24.55ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 206.22
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ID: 483950
Weight: 25.70ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 37.66
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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: 491572
Weight: 65.25ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 76.66
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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: 692701
Weight: 25.66ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 215.54
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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: 483838
Weight: 23.26ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 34.08
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ID: 491712
Weight: 66.33ct (total)
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 77.92
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ID: 473127
Weight: 21.88ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 21.08
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ID: 645797
Weight: 17.88ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 10.08
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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: 693084
Weight: 26.75ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 224.70
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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: 618052
Weight: 26.25ct (total)
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 69.30
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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: 497800
Weight: 33.27ct
Size: 20 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 36.90
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ID: 692704
Weight: 22.99ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 193.12
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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: 473128
Weight: 19.81ct
Size: 20 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 15.91
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ID: 483944
Weight: 23.68ct
Size: 20 mm (calibrated)
Clarity: Opaque
Price: $ 34.69
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ID: 692515
Weight: 26.80ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 225.12
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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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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

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

Posted By Jess in February, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I trust this company to deliver exactly what is offered. I have never had to return a selection of Gems. I appreciate the company's detailed description of their product. It helps this customer find mounts before the gems arrive. Any day of the year one can find a wide selection of gems, be it by price, color, cut, lot or single. Pricing does not jump all over the place and stays reasonable. Be assured your items will arrive in perfect condition as the company's shipping department does a great job.

Posted By Miss Sherrie in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, trusted quality. What I have purchased has always been as discribed.

Posted By Sterling in November, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Always excellent quality and service from GemSelect

Posted By Mike B. in September, 2024
Source: Bizrate

Overall Rating -> 9 star ratings

Site is easy to navigate - details on cut, polish, and finish work and techniques were helpful. 3d view or wireframe diagram of stones would be nice.

Posted By Tb in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I love gemstones. My father was a jeweler & I used to shop for stones for him.

Posted By Andie in September, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

It was very good and concise.

Posted By Whydothey in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I love the quality, presentation and the price of the stones. I love the identification card - report they send with each stone.

Posted By Dia in March, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love browsing the site and everything is easy to find. There is just so much I get lost for hours. Sometimes I wish there were videos of some gems, but other than that I love shopping with GemSelect and I have referred the site to many people many times. I work in the jewelry industry myself and I love to show off what Ive had made with my gems from GemSelect! Thank you

Posted By Antennaesglow in July, 2024
Source: Bizrate
Enlarged Gemstone Image