A free program for Android, by App Labs Games.
The Gem Art Games: Diamond Artist app is a fun, relaxing, and easy-to-play game for all ages. The gameplay is simple and intuitive, so even younger kids can easily learn how to play.
The main objective of the game is to paint and design different kinds of diamonds, such as unicorns, ice cream, cakes, and so on. Each type of diamond has a different color and pattern. To paint a diamond, you need to use different kinds of colors and patterns, which you can choose from a large variety of different options.
The gameplay is based on the concept of the painting.