NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY
Tourmaline schorl specimen. Tourmaline has a very complex and variable composition. The most common form is schorl or schorlite, shown here. This is a composite, doubly-terminated crystal, 9 centimetres across and 8 centimetres long. It includes a little limonite and crystals of apatite. This specimen is from Woolley Farm, near Bovey Tracey, Devon, UK.
Model release not required. Property release not required.