Vivianite

4.6" Gemmy, Emerald-Green Vivianite Crystal Cluster - Brazil Cabeça do Cachorro Claim, São Gabriel da Cachoeira, Amazonas State, Brazil This is a gorgeous cluster of blue-green vivianite crystals collected from the Cabeça do Cachorro Claim along the Cauaburi river of the State of Amazonas, Brazil. The crystals are in good condition and exhibit a beautiful luster and color. They are still attached to a piece of siderite crystal encrusted phosphatic matrix.