mellowyellow
Well-known Member

Seen above are two opalised fossil shells found in Coober Pedy, Australia. The name Coober Pedy comes from the Aboriginal words kupa pity and means "white man in a hole" because the opals are collected in mines. These opals were first discovered in 1915 by an accident when a teenage boy found a few rocks while his father and he were looking for gold. The opalescent play-of-color in these gems can be seen In this video.