• Beautiful top quality Columbia beautiful 5ct emerald
  • Certified Cobalt Blue Spinel Natural 2.09Ct Top Quality Spinel Tanzania
  • 2.58 CT's Natural Rainbow Moonstone, Well Radiant Cut Clean Top Gemstone
  • 2.43 CT's Rainbow Moonstone Excellent Lusture Well Cut Multicolor Stone.
  • 1,82ct Muzo Colombian Emerald 5/19,45 Colombian Emerald columbian emerald
  • Natural Colored Diamond ,Radiant Brilliant Cut, Solitaire Diamond 1.02CTS
  • Certified Padparadscha Sapphire 2.05Ct Natural Orange Pink Sapphire
  • Beautiful 4.20 Ct Natural vivid Green Tsavorite Garnet
  • 0.97ct unheated vivid blue sapphire
  • 0.79ct unheated Burmese Rubies
  • Pear Brilliant Cut Diamond , Elongated pear cut Cognac Diamond 1.36 cts
  • Natural Colored Diamond ,Radiant Brilliant Cut, Champagne Diamond 2.01CTS
  • GIANT RUBY PAINTED Natural Faceted Gemstone AR999
  • Precision Cut 20.58Ct Rare Piece of Nigeria Mine Pink Kunzite
  • 610 Ct GIANT Star ruby 100% Natural and Untreated DSR-3
  • 5150 Ct GIANT EMERALD HAND ENAMEL PAINTED Natural Faceted Gemstone AD
  • 6.71ct Teal Green Blue Sapphire , Australia Unheated Round Natural
  • Rare Jeremejevite 27.74 ct GIT Certified Forbes World's Rarest Minerals
  • 18.84 Cts Assher Cut Top Quality Natural Blue Aquamarine

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.