Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Posnjakite from
Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany


Locality type:Mine
Classification
Species:Posnjakite
Formula:Cu4(SO4)(OH)6 · H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Posnjakite data
Locality Data:Click here to view Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:76232
Long-form Identifier:1:3:76232:2
GUID (UUID V4):0
Nearest other occurrences of Posnjakite
3.3km (2.1 miles) ⓘSilver smelter slag locality, Bergstadt Altenau, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany
8.8km (5.5 miles) ⓘLautenthal smelter slag locality, Lautenthal, Langelsheim, Goslar District, Lower Saxony, Germany
18.4km (11.5 miles) ⓘLudwig-Rudolf Mine, Braunlage, Goslar District, Lower Saxony, Germany
22.8km (14.2 miles) ⓘDas Aufgeklärte Glück Mine (Aufgeklärtes Glück Mine), Hasserode, Wernigerode, Harz, Saxony-Anhalt, Germany
23.7km (14.8 miles) ⓘLouise Charlotte Mine, Dränge valley, Hasserode, Wernigerode, Harz, Saxony-Anhalt, Germany
56.0km (34.8 miles) ⓘPfaffenberg Mine, Neudorf, Harzgerode, Harz, Saxony-Anhalt, Germany
79.3km (49.3 miles) ⓘGottesbelohnung smelter, Mansfeld, Mansfeld-Südharz, Saxony-Anhalt, Germany
References
Wittern, A.; Schnorrer-Köhler, G. (1986) Die Minerale der Glücksrad-Halde bei Oberschulenberg / Harz [The minerals of the Glücksrad mine dump near Oberschulenberg / Harz]. Lapis, 11 (1). 9-18; 42
Schnorrer, Günther (1995) Mineralogische Neuheiten von bekannten deutschen Fundorten [Mineralogical novelties from well-known German deposits]. Lapis, 20 (12). 43-48; 62
 
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