Q posket is a series of figures based on several different franchises, released by Banpresto starting from 2014. In the JoJo's Bizarre Adventure series, Diamond is Unbreakable, Golden Wind, and Stone Ocean have Q posket figures.
The "Q" stands for "Quality" and "posket" means "cheeks" in Finnish. Each figure has large glossy eyes and round cheeks. In Japan, they are only available as prizes at game centers, but they can be purchased in international countries.
Diamond is Unbreakable