Spencer Opal Mines in the tiny community of Spencer celebrates Idaho’s precious opal industry. Families and rockhounds can shop for Idaho opal and arrange hands-on mining experiences through the working family-owned operation. Amenities & Features 💎 Idaho precious opal ⛏️ Mining experiences 🪨 Rockhounding and geology 🎁 Opal gift shop 🎓 Gem-mining education Good to Know Mining experiences are offered Read more...