1.9M+ REVIEWS | 1000+ NEW GEMS DAILY |
  • 4.15 CT SPINEL BLUE RAREST 100% NATURAL UNHEATED SRI LANKA
  • Certified 10.06 Carat Blue Sapphire No Heat Top Quality Natural
  • 4.09Crt Spinel NEON COBALT BLUE 100% Natural Unheated Sri Lanka
  • *NO RES* Certified Natural Royal Blue Sapphire 2.06Ct.
  • 0.38 CT 6X4 MM TOP QUALITY BLUISH GREEN RARE NATURAL ALEXANDRITE
  • NR! Massive Huge 37.31 ct Santa Maria Aquamarine
  • Natural Unheated Royal Blue Color Sapphire 1.12 Cts Emerald Loose Gemstone
  • Glittering Fanta Orange Spessartine Garnet
  • 9.75 Cts Seafoam Blue AAA Grade Natural Tourmaline Custom Cut
  • 3.81 Cts AAA Quality Natural Lustrous Beautiful Purplish Pink Spinel VVS
  • 6.21 Cts Master Cut Top Grade Natural Greenish Blue Tourmaline VVS
  • 7.43 Cts AAA Grade VVS Natural Indicolite Blue Tourmaline Custom Cut
  • 5.09 Cts AAA Grade Rare Quality Hot Pink Natural Spinel Unheated Top Luster
  • 3.02 Cts Vivid Pink AAA Grade Gem Natural Sapphire Normal Heated Only
  • 11.11 ct purplish pink tourmaline. No Treatments.
  • 6.22 Cts Premium Grade Eye Clean Natural Lustrous Greenish Blue Tourmaline
  • Certified Cobalt Blue Spinel Natural 3.19Ct Top Quality Spinel Tanzania
  • 35.33 cts Museum Piece 3D Mix HONEYCOMB White Play-Of-Color Natural OPAL
  • 12.76cts, Master Cut Green Zircon,
  • NATURAL COLUMBIAN EMERALD-6.50CTW-1PCS,NR

Explore the World's Premier Gemstone Marketplace

Auction Basics

Once you find an auction listing you're interested in, you're able to place bids against other buyers. Look for the button that says "place bid" and enter the amount you're willing to pay.

If you want to participate in the auctions of our website, you must register and become a member. Provide your contact information and a valid credit card so we can verify that you are a real person.

In this type of auction, buyers bid until the auction ends. Bidding starts at $1, and the seller must sell the item to the highest bidder.

In this type of auction, the seller has a preset bid amount that must be matched or exceeded. When you bid on a reserve price item, you will be notified if you met the reserve price.

There are no buyer's hidden fees. If you win, what you bid is what you pay.

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Gemstone Excellence By the Numbers: Our 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.