HIGH SCHOOL ACE: Knowledge Is Empowering!

Earth Science Quiz

A red corundum that contains chromium impurities is ____. amethyst
A purple quartz that contains manganese impurities is ____. diamond
Pure ____ (SiO2) is colorless and has a hardness of 7. emerald
The minerals diamond and ____ are pure carbon allotropes. graphite
The hardest naturally-occurring mineral is ____ (hardness 10). halite
The mineral form of sodium chloride (NaCl) is ____ (rock salt). pyrite
A green beryl that contains chromium impurities is ____. quartz
The mineral ____ (FeS2) is also known as Fool's Gold. ruby