"Wow" exclaimed Benny. "When I hit this mineral with my rock hammer, it broke into flat planes, in only one direction. It looks like the layers are peeling off in sheets!"
"That's because it's mica," responded Alice, his lab partner.
Benny and Alice are describing the property of ___________, which is often used to identify specific mineral families.
A) streak
B) hardness
C) cleavage
D) specific gravity