spiky celestine crystals on native sulphur from machów mine, poland, europe

ore mineral sulphur celestine crystals abstract array bladed block bright yellow brimstone burning stone chalcogen chemical element chunk clusters coarsely crystal lattice crystalline mass solid crystallization crystallographic bipyramids fertilizer fibrous forms fracture gemstone geology greasy irregular matrix microcrystals combination mineralology nonmetal orthorhombic oxygen group pale powdery surface resinous rock formation spiky structure sulfates sulfide sulfur uneven volcanic