🪨 Olivine
Green magnesium iron silicate mineral. Hawaii's green sand beaches and Arizona's San Carlos Apache Reservation are known US sources.
Best Places to Find Olivine
Hawaii Olivine (Peridot) Beaches
Hawaii Island, Hawaii · Public Beach
Papakolea (Green Sand) Beach on the Big Island — one of only four green sand beaches in the world. Olivine crystals from volcanic cinder cone.
Hawaii Lava Tube / Volcanic Specimens
Volcano, Hawaii · Public Land
Volcano National Park areas (collecting prohibited inside park) but adjacent areas for lava rock, olivine, and volcanic glass specimens.
Haleakala Volcanic Specimens
Kula, Hawaii · National Park
Haleakala National Park on Maui for volcanic rock formations and olivine crystals. Collecting is prohibited in the National Park but adjacent areas ma...