These red jewels can attract prices per carat that reach enormous heights. The cost of Ruby prices per carat might vary, but when it is polished and turned from an uncut stone to a polished gem, its value can rise dramatically, making it a sought-after item for both collectors and investors.
https://www.takatgemssr.com/blog/unveiling-the-value-of-rubies-alexandrite-and-sapphires.html