A large and exceptionally rich cabinet specimen of clinoatacamite, hosting numerous dark green clusters of the mineral set against a matrix covered by blue chrysocolla over quartz.
I purchased a large lot of Lilly Mine material while in Peru, the bulk of the specimens were mainly just druses of quartz over chrysocolla or malachite, though there were a small quantity of these very rare clinoatacamite specimens as well.
The majority of the examples I have seen have the crystals somewhat jumbled together, or set against dark green malachite matrixes. As a result, the crystals can be hard to properly appreciate. The contrasting background and distinct nature of the crystals and crystal clusters make the clinoatacamite on this piece easier to discern and appreciate.
There are some blemishes to the display face, though overall the specimen is exactly as shown.