One of the best silhouette shots I have seen on Flickr - as well as a great example of the frame-within-frame composition technique. An excellent creation by my Flickr friend Rod Anzaldua.
All rights retained by the photographer.
Calcite/hematite - I have seen this crystal (size about 10 cm) described as a deconstructed chocolate bar. It is actually a piece of calcite coloured red by small inclusions...
8 hours ago