Where to Find Gypsum in Utah

Utah gypsum is widespread in the Paradox basin and the Carmel and Arapien formations of central and southern Utah. The San Rafael Swell exposes selenite blades and rosette clusters in the Carmel Formation outcrops along the swell's eastern flank, and the Arapien Shale near Salina in Sevier County produces clear, water-grade selenite up to 30 centimeters. The shoreline of the Great Salt Lake yields hopper-style selenite crystals in muddy salt flats, and the Kanab area in Kane County turns out massive alabaster and satin-spar veins in the Moenkopi Formation. Selenite is soft (Mohs 2) and scratches easily, so transport in padded boxes. The most productive ground is in San Rafael Swell Carmel Formation (Emery County), Arapien Shale (Sevier County), Great Salt Lake shoreline (Tooele County).

Casual hand collection of common rocks and minerals like gypsum is allowed on most BLM and U.S. Forest Service land in Utah, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always confirm rules before a trip.

San Rafael Swell Carmel Formation (Emery County) is the standout. Other strong ground includes Arapien Shale (Sevier County), Great Salt Lake shoreline (Tooele County).