We will be closed Dec 24-Jan 1 for the holidays. Please note that we are unable to guarantee delivery for the holidays on items ordered after their specific cut-off dates: findings, solitaires and castings that require finishing 11/21/18, shanks 12/3/18, bands 12/7/18, large orders of silver sheet and wire 12/10/18, large orders and non-standard items for gold and platinum 12/10/18, sheet and wire, catalog items 12/14/18, grain and solder 12/20/18, sweeps and stone removals 12/12/18, clean scrap 12/17/18, diamond orders 12/20/18. Have a wonderful holiday season!
12.11.2018 Metal Prices
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Harmony Diamond Auctions

Polygon Partnership

Want to sell diamonds? Getting your diamonds in front of hundreds of qualified buyers all over the world has never been easier! Our simple, no-risk process allows you to get the HIGHEST MARKET PRICES for your diamonds quickly and consistently!

Want to buy diamonds? With detailed descriptions, multiple photos and expert strict grading information, you can place your bids online with confidence, from the comfort of your home or office! Plus, you get a 24 hour review period so you can purchase risk free! Purchasing recycled diamonds directly from gold buyers, jewelers and pawnbrokers has never been easier!

We offer GUARANTEED RECYCLED DIAMONDS and our auctions feature 360 DEGREE INTERACTIVE VIEWS with ZOOM Capability!

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Diamond Auction Process

Our cutting-edge online auction platform connects motivated diamond sellers with qualified buyers all over the world! Combining ground breaking technology and extensive expertise provides you with the best way to buy and sell recycled diamonds in the marketplace!

Auction Features Include:
  • Comprehensive diamond information including grading, detailed descriptions and multiple photos!
  • Completely virtual process allows buyers to bid from anywhere in the world!
  • Quick, efficient, and effective process with unique tracking tools!
  • Innovative auction features and notifications to help maximize value!

Experience the no risk rewards of the Harmony Diamond Auctions!





Harmony Auctions Video

Next Auction

Diamond auctions are normally held twice a month starting on the 1st and 3rd Mondays of every month!


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Diamond Auctions


Diamond Auctions
The best way to buy and sell recycled
diamonds in the marketplace!

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