Sapphire – $1.75 Million/Kg

This predominantly blue gemstone was one of the many features that made the ‘90s epic romance, Titanic such an unforgettable movie. The brilliant contrast against Rose’s pale skin made many girls want to own a sapphire gem.

The sapphire can go for as high as $1,750,000 for one kilogram worth. This variant of the corundum family (aluminum oxide) is an outstanding gemstone due to its pure blue colors, quality, and excellent durability. Did you know that all sapphires, however, aren’t blue? They can come with all the varying shades of the rainbow!