Olivine is not uncommon in Hawaii. It's one of the building block minerals of basalt that makes up 99.99% of the rocks of the islands. #hawaii #lava #basalt #geoetc https://t.co/HZ9kvjXcHF pic.twitter.com/kvcm9pgik7

— GEOetc (@GEOetc2) June 15, 2018