This is fluorite, a widely occurring mineral found in parts of China

This is fluorite, a widely occurring mineral found in parts of China, Europe, and North America. Dubbed "the most colourful mineral in the world", it's commonly found in shades of purple, blue, green, yellow, and more rarely in pink, red, white, brown, and black.

This amazing shot by German photographer

This amazing shot by German photographer Martin Rietze captures the moment when a bolt of lightning flashed in an erupting volcano in Japan last year. The volcano, named Sakurajima, has been erupting almost constantly since 1955.