Johannite forms spherical aggregates of apple green color, reaching sizes of up to 1 mm and sitting on a matrix. They often intergrow, sit on each other, and thus form accumulations. Also, on this specimen, johannite forms fine-grained coatings. On the specimen, johannite occurs together with colorless gypsum. This is a high-quality and very rich example of this uranyl sulfate, which comes from the Svornost mine in Jáchymov. Jáchymov is the type locality for this mineral.
Localities, Czech Republic, Mineral Classification, Sulfates, Size, Micromounts, Type Localities
Johannite
Out of stock
Location: Jáchymov, důl Svornost, ČR [en]
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