Description

Detailed Description

This is a beautiful aggregate of probertite crystals – very lustrous and glassy, with good transparency. Nestled at the bottom (or top or side, depending on how you choose to orient the piece) is a group of sharp, complete anhydrite crystals. Excellent combination specimen!

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About these Anhydrite/Probertite Specimens

These excellent specimens of anhydrite and probertite were found in a pocket at the Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz, Thuringia, Germany. The anhydrite crystals are amazing – euhedral, very pale lilac, translucent to transparent. I am told that although they are encountered at this locality once in a while, this is only the third time in the last 30 years, so it is not a common occurrence.

Anhydrite is one of those common minerals that is incredibly hard to obtain in display specimens, other than the relatively common light blue Mexican anhydrite fans. Euhedral, well developed crystals of any decent size are rare.

Probertite is a relatively rare borate mineral that occurs as transparent, colourless, heavily striated, lustrous crystals. Atother world localities it usually occurs as radiating aggregates of acicular or columnar crystals, coarser crystal aggregates are uncommon and euhedral terminated crystals much more so.