2024-10-04 Portland Regional Gem & Mineral Show (43rd Annual) Portland Regional Gem & Mineral Show (43rd Annual) October 4 @ 10:00 am - October 6 @ 6:00 pm Portland Regional Gem & Mineral Show (43rd Annual) 40+ dealers selling rocks, minerals, fossils, jewelry, beads, faceted gems, and lapidary supplies. Over 50 display exhibits of rocks, minerals, $7 – $12