Roman coins soaked in olive oil. Before the soak, they had the appearance and feel of disc-shaped sandstone rocks from centuries of concretion. The turquoise color is from dissolved copper oxide.
218 views

Roman Coins

Added to Roman Coins and categorized in 1 year ago

Roman coins soaked in olive oil. Before the soak, they had the appearance and feel of disc-shaped sandstone rocks from centuries of concretion. The turquoise color is from dissolved copper oxide.