Stellerite is an uncommon mineral and a member of the Zeolite group. It’s Spherical crystal aggregates easily identify this mineral, but its less common fan-shaped, wheat sheaf and bow-tie crystal formations and clusters are difficult to distinguish from the more well-know Zeolite, Stilbite. It is transparent to translucent, and its colors include white, yellow, orange, peach, brown and colorless, with a pearly luster. It often occurs in association with Calcite, Quartz, Chabazite, Heulandite, Epidote, Pyrite and Fluorite to name a few.

The crystal system for Stellerite is Orthorhombic, most commonly found as rounded, radial crystal formations. These rounded radial groups can be found in intersecting clusters and/or in separate, individual groupings. They can also be found in platy, fan-shaped, wheat sheaf and bow-tie aggregates, and rarely as flat tabular crystals with pointed tips.

Stellerite is uncommon and found in limited locations worldwide. Notable localities include Australia, India, Kazakhstan and USA (New Jersey).