Gallery/calcium Sulphate
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box of vintage lecturers chalk squares
box of vintage lecturers chalk squares
JouravskiteThis lovely lemony yellow crust and crystal is a rare calcium manganese sulphate mineral.
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
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
DespujolsiteOne of the rarities of the mineral world is this calcium manganese sulphate named after
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