A mixed compound, solid solution of 2 different Tutton's salts: potassium-copper and potassium-magnesium. Approximate formula: K2(Mg0.5Cu0.5)(SO4)2·6H2O
- Crystal system: monoclinic
- Crystal shape: flat slant prisms with rhombic base, very different from the shape of pure schoenite.
- Color: light blue, much lighter than copper sulfate
- Stability on air: stable
Mix K2Cu(SO4)2·6H2O and K2Mg(SO4)2·6H2O approximately in 1:1 ratio, dissolve in water and crystallize.
Mildly toxic as all copper compounds