The little details are often what stand out most for guests.
This do-it-yourself soap is definitely one of those details, and all you need is some clear glycerin soap, food coloring. and a microwave or stove.
Melt the clear soap, and add food coloring. After letting it set you have solid blocks to cut into gem-like pieces.
Get a large container and fill it with the solid pieces of colored soap, add liquefied soap of a different color and freeze until solid.
When this is finished cut the large pieces into shape.
Shape them like gems or whatever you want and wow anyone needing to wash their hands.