a cluster of infiltrative malachite minerals with a velvety sheen surface. unpolished raw natural rock with the bulbous formation

malachite mineral stone natural rock green velvety formation cluster abstract background bulbous aciniform aggregates arrangement assemblage botryoidal carbonate closeup clustered clusters concentration concretion congo copper earthy geology grape pickle kidney shaped pigment mineralogy nature pattern pure raw shape sheen solid stalactite stalagmitic masses strange surface texture textured unusual