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.

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

20 mm Round Gemstones Weight

20 mm Round Gemstones Size

20 mm Round Gemstones Clarity

20 mm Round Gemstones Price

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$ 65.01

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Why Buy 20 Mm Round Gemstones from GemSelect?

Trusted Worldwide Since 2003
Supplying natural gemstones to jewelers and collectors in 120+ countries
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GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026

Source: Bizrate

Overall Rating -> 10

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025

Source: Bizrate

Overall Rating -> 10

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025

Source: Bizrate

Overall Rating -> 10

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026

Source: Bizrate

Overall Rating -> 10

I have made many purchases from GemSelect over the years, and I have a beautiful collection of jewelry as a result. My purchases have always been exactly as described, and I have enjoyed doing business with you.

Posted By MMM in July, 2026

Source: Bizrate

Overall Rating -> 10

Easy and good price

Posted By Bry_guy in March, 2026

Source: Bizrate

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