Macrophotograph of quartz on fluorite (calcium fluoride); Green Fluorite Mine, Manaoshan Mountain; Hunan, China Image #4137 3094 X 4622 pixels
Macro photograph of linear patterns in a piece of Wonderstone rhyolite; an igneous rock formed as magma cools Image #2709 4682 X 3148 pixels
Macro photograph of the detail in a piece of Birds Eye rhyolite; a rock of volcanic origin Image #2849 3200 X 4693 pixels
