- Chemistry: K2Fe6
3+(SO4)4(OH)12, Potassium Iron Sulfate Hydroxide
Historical yellow pigment, 0-100 µ, half opaque, similar to ochres.
Occurrences in Egypt, Spain, Cyprus, Russia and North America.
Jarosite is a natural, stable iron mineral with a characteristic light yellow hue. Our Jarosite today comes from New Mexico in North America. Jarosite was used, for example, in Russian icons and ancient Egyptian paintings. Use immediately in lime, do not let stand.
- Lightfastness – medium: 8 (1 is bad, 8 is best)
- Lightfastness – thinned: 8 (1 is bad, 8 is best)
- Lightfastness – concentrated: 8 (1 is bad, 8 is best)
- Suitability: Acrylics, Cement / Tadelakt, Lime / Fresco, Oil, Tempera, Watercolor / Gouache
- Colors: Yellow
- Forms: powder
- Solubility in water: insoluble