Name                                                                                                                           Date:
Geology Clues to Identify Your Rock

Tests What to do What I found out about 
my rock
General Description
What is the grain size and texture?  Are there flecks of shiny material?


Color
Look at the sample and determine its color - white, black, green, clear, etc.

Luster
Look at the sample to determine if the mineral is metallic in appearance (looks like a chunk of metal) or non-metallic (doesn't look like a chunk of metal).

Hardness
Scratch the unknown rock with a known hardness to determine which is harder. Continue doing this with harder or softer minerals from the kit until the hardness is determined.
 
Streak
Grind a small amount of  the mineral into a powder on a porcelain streak plate and determine the color of the powder. 

Fracture


Examine the mineral for areas where it  is broken. Is the break irregular or smooth?