Need guidance with coming up with program in Ruby.

Need guidance with coming up with program in Ruby. It should prompt the user to enter in information about gemstones (name, color, and price), then display the information to the user after all of the information is entered. Price to be inputted as an integer or a float, but displayed as a currency. gemstones should be sorted before being printed. Allow the user to input any number of gemstones. Come up with a class and a custom module and use it in the class.