The Green Sandy Beaches of Hawaii
Israel Kamakawiwo’ole sang about the white beaches of Hawaii, but did you ever hear of the green beach of Hawaii? Yes, green. This natural rarity can be seen on the Big Island at Papakolea where Olivine semi-precious stones have been eroded by the ocean making green sand.
Fortunately (or unfortunately), this phenomenon is shielded by a long and moderately difficult hike, limiting its access.
Check out pictures of the Papakolea Green Beach from To-Hawaii.com.
Thanks to @mirthlab for the information and picture.