Here is a beautifully crystallized specimen of apophyllite, set on crystals of white stilbite with an underlying basalt matrix. The apophyllite is a bright green color, is nearly gem clear, and has formed as square crystals with sharp flat-topped terminations. This is a dramatic and aesthetic specimen of what has come to be called disco ball apophyllite because the shape of the crystal groups resembles the mirrored spheres seen in discs in the 1970s.