Presentations

This is an embedded Microsoft Office presentation, powered by Office.

Sisyphos Rocks – Toxic Minerals This is an extension of a presentation I gave to OMGMS on toxic minerals. It’s an attempt to debunk the typical clickbait article.

Sisyphos Rocks – Petoskey Stone This is a presentation I gave to the Ozark Mountain Gem & Mineral Society on the Petoskey Stone, Michigan’s state stone.