PRESENTATION OUTLINE
Mineral Properties Explained/Illustrated
Cleavage:
Minerals tend to break along lines or smooth surfaces when hit sharply. Different minerals break in different ways showing different types of cleavage.
Three Directional Clevage
Crystalline Structure:
When liquid hot magma cools it makes rocks. How large the crystal is depends on the amount of time and pressure while cooling. Crystal shape depends on the compounds the original magma was comprised of.
Obsidian is created by lava jutting out of a volcano so fast that crystals do not have time to form
Quartz has a very similar chemical compound to Obsidian the only difference is the time it takes to cool.
