This fun and educational science brain teaser was created to be used with the the Prentice Hall "Science Explorer: Inside Earth" Textbook. At the back of the book there is a chart listing common minerals and their properties. This brain teaser is in the form of an article about '5 minerals' that were stolen from a "Federal Mineral Reserve". Students use clues given along with the chart in the textbook to identify the minerals. This brain teaser was created as an extra credit assignment, and therefore states in the "article" that "compensation" (extra credit) will be awarded to those who successfully identify the thieves and their minerals.