• 1,30ct Teal/blue to teal/green colour change Sapphire - Master cut
  • Incredible Quality AIG Certified 4.00 Ct Blue Green Color Natural Paraiba
  • Royal Blue Amethyst 29.30Ct ROSE de FRANCE AMETHYST - BRAZIL
  • 3.79 Cts Natural Gorgeous Pink Morganite Pear (Drop) Cut PAIR 2Pcs Brazil
  • IGI Certified Burma Blue Sapphire, 1.09 Carats, Cornflower Blue Marquise
  • *BLACK FRIDAY NR SALE* Padparadscha Sapphire 2.02Ct No Heat Certified.
  • 3.31 Carats 100% Natural Paraiba Tourmaline GIL Certified Green Gemstone
  • -NO OIL- Stunning Colombian Muzo Emerald Heart Cut 0.51CT
  • Certified Royal Blue Sapphire 4.10Ct Top Quality Sapphire
  • Flawless 10.15Ct Tanzanite AAA Precision Cut Gemstone
  • Unheated 3.24 Cts Natural Pink Sapphire Radiant Cut Loose Gemstone Rings
  • 1.00 Ct. Ruby | Mined in Mozambique | Certified by IGI | Unheated
  • 1,24ct Bicoloured teal/blue Sapphire - Master cut!
  • 1,40ct Neon Pink Luc Yen Spinel - Master cut!
  • Royal Blue Sapphire No heat 5.52Ct Top Quality Sapphire Srilanka
  • 0.69 cts Zambian Emerald | MG-ZE35.
  • Beautiful 11.64 CT Natural Morganite Gemstone.
  • 4,22ct Colombian Emerald 17/23 Colombian Natural Emerald Colombian Natu Eme
  • 15.65 CT's Natural Watermelon Tourmaline, Octagon Unheated Gemstone

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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About Gem Rock Auctions

Welcome to Gem Rock Auctions. If you are looking for loose gemstones, gemstone rough, mineral specimens, Birthstones, Diamond, Sapphire, Rubies, or anything else to do with gemstones, you've come to the right place. Gem Rock Auctions is a global online marketplace where verified sellers from all over the world have been approved to sell authentic gemstones directly to you. We help you buy gemstones online and explain what to look for when buying gemstones in our Gemstone Encyclopedia. Gem Rock Auctions ensures that high-quality gemstone are being sold online and looks forward to being your solution for purchasing fine gems from around the world.

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.