Formula: Ca(Cu,Zn)₄(SO₄)₂(OH)₆ · 3H₂O

Species:

Colour: Sky-blue

Lustre: Vitreous

Specific Gravity: 3.00

Crystal System: Orthorhombic

Member of: Devilline Group

Name: Named in 1985 by Halil Sarp for being the orthorhombic polymorph of serpierite.

Type Locality: Chessy copper mines, Chessy, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes – France

A species very hard to distinguish from devilline and bladed serpierite.