Zellerite is a uranium mineral, named after its discoverer, geologist Howard Davis Zeller.

It has a type locality of the Lucky MC uranium mine in Wyoming, USA.

The size of each crystal is up to 2 mm, and it grows in roughly radial aggregates, veinlets, and incrustations.

The concentration of the mineral per Gamma Ray American Petroleum Institute Units is 280.20.

It is associated with metazellerite, gypsum, uranophane, meta-autunite, schoepite, iron sulfides, limonite and opal.