Natural Minerals

31. What is the hardest mineral on the Mohs scale?
a) Quartz
b) Diamond
c) Topaz
d) Corundum

32. Which mineral is commonly used as a lubricant?
a) Graphite
b) Calcite
c) Halite
d) Feldspar

33. Which mineral is commonly used in toothpaste as an abrasive?
a) Quartz
b) Feldspar
c) Calcite
d) Gypsum

34. Which mineral is the primary component of sand?
a) Quartz
b) Feldspar
c) Mica
d) Olivine

35. Which mineral is commonly used in insulation and as a fire retardant?
a) Talc
b) Gypsum
c) Asbestos
d) Halite