12. What is the hardest known mineral?
A Gold
B. Quartz
C. Diamond
D. Silver
13. Mosi minerals do NOT split apart evenly. Instead, they have a characteristic type of
A. Crystal
B. Luster
C. Cleavage
D. Fracture
14. The repeating pattern of mineral's particles forms a solid called
A. Compound B. Glass
C. Crystals
D. Rock
15. It refers to the minerals resistance to being scratch.
A. Luster
B. Fracture
C. Hardness
D. Color​