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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!"

8.00 CT 15x11mm 8000usd Loupe Clean Top Grade AAAA Natural Tanzanite
Padparadscha Sapphire 2.00Ct Orange Pink Sapphire
4.59carat Natural chrysoberyl gemstone
4.09 carat Natural spinel Gemstone.
23pcs 5.46ct Multi Color (Bi color) Natural Sapphire GGTL certified
8.00 CT 15x11mm 8000usd Loupe Clean Top Grade AAAA Natural Tanzanite
6.05 Cts AAA Grade Eye Clean Natural Lustrous Rich Lavender Spinel Unheat
1.11 Cts Round AAA Grade Vivid Green Natural Tsavorite Amazing Luster
Private Listing
Certified Royal Blue Sapphire 3.05Ct Top Quality Sapphire Srilanka
Mahenge Spinel Natural 10Ct Top Quality Spinel Tanzania
Certified Vivid Blue Sapphire 2.70Ct Top Quality Sapphire
RAREST BI-COLOR LAVENDER PURPLE SPINEL 3.00 CTS UNHEATED GEM PIECE TANZANIA
Private Listing
AIG Certified!4.75 Cts Natural Spinel From Tanzania
Certified Alexandrite 8.24 ct Color Change Untreated Sri Lankan SKU.12
Mozambique Ruby (2.22 Ct) - Deep Red Color - [ALGT Certified] (Seal Box)
1.5ct Oval Orange-Pink Imperial Topaz GIA Certified
Rare sirlanka mine teal-Colour natural 4.05 Ct Natural no heat Sapphire
2.00 PARAIBA GIL CERTIFIED 100% NATURAL COPPER BEARING UNHEATED

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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.