Stones and gems of the USA

This poster was shown at the 2019 Geological Society of America Pardee Symposium on Communicating Science. You may click on each mineral to link to the piece of jewelry which is connected to more information on each stone. 1strow Variscite, Utah Various silica, Oregon...
Mine to You

Mine to You

A gemstone’s trip from the earth to your hands is often long and complicated.  From the time the stone leaves the earth, many people handle these objects/  This diagram, based on the many years’ experience of Eric Braunwart of Columbia Gem House,...

Millions of Names

The field of igneous petrology – the study of the chemistry and origins of the many igneous rocks around the world – is infamous for the number of names. It is off-putting for students and, frankly, I don’t know of anyone who has an interest in...