Macrophotograph of a polished slice of charoite; a rare silicate mineral found only in Siberia, Russia Image #2834 4689 X 3064 pixels
Macro photograph of patterns in a cross-sectioned carnelian geode; carnelian is a variety of chalcedony, which is a variety of quartz; from Washington State Image #2895 4724 X 3087 pixels
Macro photograph of patterns in a Whitcomb Creek geode from Oregon; a geode is a stone nodule with an inner cavity filled with crystals or mineral matter Image #3289 4627 X 3078 pixels (3.28 MB)
