Macro photograph of the silvery blue bladed structure of the mineral kyanite, an aluminum silicate. From Brazil Image #2584 4748 X 3117 pixels
Macro photograph of the crystalline structure of citrine, a variety of quartz; the coloration comes from tiny particles of iron oxide suspended within Image #3698 4800 X 3200 pixels (5.42 MB)
Macrophotograph of a slice of rhodochrosite stalactite; from the Capillitas Mine, Catamarca Province; Argentina; rhodochrosite is a manganese carbonate mineral Image #4139 6144 X 4080 pixels
