A beautiful ball of azurite, a complete 5 cm in diameter floater made up of concentric rosettes of deep, royal blue rhombohedral crystals. But what's the most interesting with this specimen, and really sought after by collectors for being iconic of Chessy, is the combination with contrasting green cuprite octahedrons scattered on the azurite! Actually, the cuprite is replaced by malachite: it is a pseudomorph.Here is a fine quality classic specimen from a historical deposit, regarded as type-locality for azurite (locally named 'chessylite' by ancient authors until the name azurite was popularized internationally in the early XIXth century).