A natural Botryoidal Malachite specimen, these formations are also nicknamed "Brains" due to their bubbling resemblance to a Brain. This piece is completely natural and unpolished.
Malachite often results from weathering of copper ores and is often found together with azurite, goethite, and calcite.
Archeological evidence indicates that the mineral has been mined and smelted at Timna Valley in Israel for over 3,000 years. Malachite was also used as a mineral pigment in green paints from antiquity until about 1800.