I’ve seen a lot about Lindy’s Magicals lately. Magicals are powdered, dye based pigments that come in flat (matte) or shimmer.
These powders are highly concentrated and are used with another medium such as water or transparent gel medium. Their site states to use them with a transparent medium since an opaque medium greatly diminishes the visibility of the Magicals.
Lindy’s Gang also has coordinated sprays (used in the tag below).
These powders and sprays are a mixed media artist’s dream!