My kids had a blast when we were in the Azores last summer digging through the volcanic sand beach for these green, orange, and red stones. They aren't found ne

My kids had a blast when we were in the Azores last summer digging through the volcanic sand beach for these green, orange, and red stones. They aren't found near the beach where we live, and we took a few larger ones back home. This green specimen is Olivine, which is indeed quite common, but not ubiquitously everywhere.