Gilalite , Kinoite , Hydroxyapophyllite-(K) Locality: Christmas Mine (Red Bird shafts; Inspiration Mine; Hackberry shafts), Christmas, Christmas area, Banner District, Dripping Spring Mts, Gila Co., Arizona, USA Dimensions: 5.2 x 4.1 x 1.8 cm Description: Gilalite is a very rare hydrated copper silicate found at only four localities worldwide and the Christmas Mine is the Type Locality. Clusters of pretty spring-green gilalite botryoids, bright azure-blue crystals of the rare calcium copper silicate, kinoite and glassy colorless apophyllite crystals are richly scattered on the matrix plate on this very fine and showy combination miniature from this locale. Choice and rare combination material. — Photo: Robert M. Lavinsky · CC BY-SA 3.0
Hydroxyapophyllite-(K)
Hydroxyapophyllite-(K) is an IMA-recognized mineral species in the silicate class, with the chemical formula KCa₄Si₈O₂₀(OH,F)·8H₂O.
It crystallizes in the tetragonal crystal system (space group P4/mnc). It is a member of the Apophyllite structural group.
IMA symbol Hapo-K, IMA status: approved, named in 1976.