Yes, this is a natural specimen of chrysocolla. This was a find not too long back at the copper-rich L'Etoile Mine in Democratic Republic of Congo, of chrysocolla that is so strange and pretty you can hardly believe it is real. The two-sided, botryoidal surface looks like molten plastic: one side is an intense, deep robin's-egg blue; while the other side is a more turquoise-blue, with hints of green.