Stellerite
Centreville, Virginia

This specimen measures 6cm x 5cm

Stellerite CaAl₂Si₇O₁₈^.7H₂O

Tectosilicates, zeolite group, may be confused with stilbite and barrerite

Color and Luster: White to yellow, orange, and brown, vitreous

Hardness: 4.5

Cleavage: Perfect in one direction

Fracture: not reported

Crystals: Orthorhombic, commonly in spherical aggregates

Photo by Gini Pritchard