This weekend at the Nevada County Fairgrounds – it’s the Earth’s Treasures Gem and Mineral Show, held in Main Street Center on Saturday and Sunday (October 7 & 8) from 10 am to 5 pm. Check out the gem and mineral collections, visit the booths of the numerous vendors, bid on minerals and rocks at a silent auction, watch local artisans at work, and see the demonstrations. This show is a great place to meet other enthusiasts, buy supplies, and experience everything the rock and mineral hobby has to offer. Presented by the Nevada County Gem and Mineral Society. For information, visit here.