Sapphire
Per carat price: $1,200 to $2,000
Sapphires are the second-most popular gemstones after diamonds. Most people think sapphires only come in blue but some stones come in yellow, orange, pink, green, and black. The most valuable sapphires are those with the deepest color saturation and those that are the largest.
Source: Work + Money
The most expensive sapphire in the world is the Blue Belle of Asia, which is a 392.52-carat stone discovered in Ratnapura, Sri Lanka. It was sold for $17.56 million. That’s about $135,000 per carat. The unidentified buyer acquired the Blue Belle of Asia at an auction in Geneva.