Official monetary unit of the Imperium, its purchasing power set at quatricentennial negotiations between the Guild, the Landsraad, and the Emperor.

• On the Imperial market, Melange went as high as 620,000 solaris the decagram.
• During their rule, House Harkonnen took ten billion solaris out of Arrakis every 330 standard days.
• House Harkonnen offers a reward of one million solaris for a single crysknife.