Question: what are the 6 characteristics of rocks?
Answer: 6 Characteristics for Rocks And Minerals! There are 6 types of characteristics for rocks and minerals. ... 
Hardness. The mohs hardness scale.
Lustre. The lustre comparison.
Colour. This is a comparison of different colours of the minerals.
Crystal Structure. ... 
Streak. ... 
Cleavage and Fracture.