a gold crown normally consist of gold and platinum and may contain many different metals, especially in the case of a "discount crown", where silver, copper, palladium, tin, indium and/or molybdenum are substituted for the expensive metals.

Write the above sentence using proper case.
A gold crown normally consist of gold and platinum and may contain many different metals, especially in the case of a "discount crown", where silver, copper, palladium, tin, indium and/or molybdenum are substituted for the expensive metals.