Mineral
Girolita
Ca₁₆Na₈Al₄₈Si₉₆O₃₈₄·92H₂O · Silicatos (Filosilicatos)
Gyrolite is a hydrated calcium–sodium phyllosilicate that typically forms in cavities of basalts, where it develops characteristic spheroidal aggregates. Its name derives from its globular habit ("gyros" in Greek means "round").
Etymology
From the Greek "gyros" (round) and "lithos" (stone), in reference to its characteristic spheroidal aggregates.