Macro photograph of a slab of Rainbow fluorite (calcium fluoride) from China Image #2647 4775 X 3200 pixels
Abstract macro photograph of a Dugway geode; from the Dugway Geode beds of Utah Image #2384 4757 X 3141 pixels
Macrophotograph of a cluster of peridot crystals from Arizona. Most peridot is approx. 90% forsterite which is a form of olivine with a high magnesium content. Image #4112 6063 X 3930 pixels
