Inspired by the gem and mineral mecca, Quartzsite, Arizona, the HDTS Gem/Mineral Expo features our own vast array of gems, minerals, and crystals for sale at every price range, from $1 to $100.Concurrent with the expo is the Painted Rock Auction–a silent auction of artist-painted rocks, inspired by Scott and Tyson Reeder’s project, General Store Rocks (originally featured in Amy and Wendy Yao’s Art Swap Meet at HDTS 2004).