Few things in nature are more creatively patterned than agate, a type of quartz that forms in concentric layers in a wide variety of colors and textures. The fine-grained rock has been a favorite carving material since at least as far back as Ancient Greece.
These macro shots of agate, part of a Flickr set created by a Czech mineral shop, show off the rock’s psychedelic patterns and textures in stunning fashion, offering more proof (not that we needed it) that nature is the world’s greatest artist.
For more macro nature photo fun, check this out.