Calcium Sulphate Gallery
minnie maus
itsyeowangshidae
themalecelebfakes
ex-atomos
mein-eigenes-endloses-weiss
box of vintage lecturers chalk squares
JouravskiteThis lovely lemony yellow crust and crystal is a rare calcium manganese sulphate mineral.
Jouravskite with QuartzThis lovely lemony yellow crust on a bed of transparent and iron coated quart
DespujolsiteOne of the rarities of the mineral world is this calcium manganese sulphate named after
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