Geyserite


Red and yellow crusts collected in the Valley of the Geysirs.
For now I just call it 'Geyserite'. Note that in countless other hotsprings around Kamchatka the red color is caused by dispersed cinnabar or realgar
and the yellow color is often caused by orpiment. I have no proof this is the case here.
[photo/collection: Maurice de Graaf]