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Explore the World's Premier Gemstone Marketplace

What Our Customers Are Saying

"My 'Go-To' website for gemstones of all prices. Sellers are verified and if you have any questions they have a service to check what you're thinking about buying."

"I have been purchasing from GemRock Auctions for over 5 yrs. I have purchased around 700 gems for my collection."

"Such a great variety. I found a sapphire I couldn't find anywhere else!"

Cornflower Blue Sapphire 2.21Ct No Heat Top Quality Sapphire Srilanka
4.33ct Tanzanite - Loupe Clean / Cushion / Violet Blue / Great Cut
GIA Certified Private listing For My Buyer.
7.73ct Light Violet IGI CERTIFIED Jadeite Jade ‘A’ Grade Oval Cabochon
Incredible Quality 9.24 Carats Pear Shape Tanzanite Pair
*NR fEsTiVaL* Rare 5.62Ct Certified Tsavorite Garnet
Capelinha Chrome Sphene: 5.28 ct High End Brilliance Born In Madagascar
Private 10.42 list
Big Aquamarine 27.60 Ct Cushion Cut Natural Mesmerising Big Aquamarine
Certified NO HEAT TOP Padparadscha 3.04 Ct Natural Orange Pink Sapphire
Certified top quality Greenish 5.31 Cts Natural Paraiba Tourmaline
1.07 Ct Sri Lanka No Heat AAA Grade Cornflower Blue Sapphire Certified
*NR fEsTiVaL* Lotus Certified Natural Montana Sapphire 1.08Ct.
21.50CTS AUSTRALIAN BLUE SAPPHIRE ROUGH TBM-1161
Certified Padparadscha Sapphire 1.68Cts 100%Natural Orange Pink Sapphire
5.35 Cts Eye Clean Very Beautiful Natural Greenish Blue Tourmaline
4.49 Cts Eye Clean Top Quality Natural Greenish Blue Tourmaline
11.23 Cts Eye Clean Fine Grade Greenish Blue Natural Tourmaline
4 Carats Natural Color Tourmaline Gemstone
15.45CT 9000usd 14X10MM Red flash Blue Tanzanite Designer Pair

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Marketplace Milestones

Why Choose Gem Rock Auctions for Your Gemstone Needs

Welcome to Gem Rock Auctions, your ultimate destination for discovering and acquiring an exquisite array of loose gemstones, gemstone rough, mineral specimens, and a diverse range of birthstones including diamonds, sapphires, and rubies. At the heart of our service lies a commitment to bring you closer to the beauty and diversity of gemstones from around the globe.

As a leading global online marketplace, Gem Rock Auctions prides itself on hosting a network of verified sellers. Each seller is rigorously vetted to ensure they meet our high standards of authenticity and quality. This means that every gemstone available through our platform is not only genuine but also adheres to the highest standards of quality.

Our mission extends beyond merely being a marketplace; we are your guide in the vibrant world of gemstones. Through our comprehensive Gemstone Encyclopedia, we empower you to make informed decisions by providing insights and expert advice on what to look for when purchasing gemstones. This educational approach ensures that your journey into the world of gemstones is both enjoyable and enlightening.

At Gem Rock Auctions, we are dedicated to ensuring the integrity and quality of your gemstone purchases. Our platform is more than just a place to buy gemstones; it's a space where the beauty and rarity of gemstones are celebrated and made accessible to you, no matter where you are in the world. Join us in exploring the treasures that lie within the earth and find your perfect gemstone, sourced from the finest locales across the globe.

All sellers on Gem Rock Auctions must comply with our Verified Sellers program which ensures a high degree of industry knowledge, consistent refund policy and pricing.

The Gemstone Sheriff program allows our members to request an audit on any item, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.