A constant source of inspiration, natural history is not only an interesting subject but also a feast for the eyes. Too excessive for one post, I'll begin with minerals, crystals and patterns from the past.
Fool's gold: The scientific name for this widespread mineral is pyrite, derived from the Greek word for fire (pyr), which refers to the sparks that are produced when it is struck with a hammer. Personal photo from The Natural History Museum, London.
"The word crystal comes from the Greek word krystallos. This in turn is derived from kryos, which means icy cold. The ancient Greeks thought that clear rock crystals (usually the minal quartz) were actually ice, frozen too hard to melt." The natural History Museum, London
Image credits: A combination of personal photographs and flickr finds. Every image is linked to further information or the original source.