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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Quartz from
Heidelberg, Seiffen, Erzgebirgskreis, Saxony, Germany


05901460017364645855051.jpg
Amethyst

Heidelberg, Seiffen, Erzgebirgskreis, Saxony, Germany
05901460017364645855051.jpg
Amethyst

Heidelberg, Seiffen, Erzgebirgskreis, Saxony, Germany
00725130017272089519347.jpg
Amethyst

Heidelberg, Seiffen, Erzgebirgskreis, Saxony, Germany
Locality type:Vein
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Heidelberg, Seiffen, Erzgebirgskreis, Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:985354
Long-form Identifier:1:3:985354:6
GUID (UUID V4):0
Nearest other occurrences of Quartz
4.2km (2.6 miles) ⓘFortuna adit (Fortuna mine), Deutschkatharinenberg, Deutschneudorf, Erzgebirgskreis, Saxony, Germany
4.5km (2.8 miles) ⓘNikolai adit, Hora Svaté Kateřiny, Most District, Ústí nad Labem Region, Czech Republic
6.2km (3.9 miles) ⓘAltväter samt Eschig Mine, Sayda, Mittelsachsen, Saxony, Germany
13.3km (8.3 miles) ⓘLoučná, Lom, Most District, Ústí nad Labem Region, Czech Republic
15.5km (9.6 miles) ⓘMoldava deposit, Moldava, Teplice District, Ústí nad Labem Region, Czech Republic
16.4km (10.2 miles) ⓘEclogite outcrop, Forchheim, Pockau-Lengefeld, Erzgebirgskreis, Saxony, Germany
16.4km (10.2 miles) ⓘSerpentinite quarry, Zöblitz, Marienberg, Erzgebirgskreis, Saxony, Germany
17.4km (10.8 miles) ⓘKamenička, Blatno, Chomutov District, Ústí nad Labem Region, Czech Republic
17.5km (10.9 miles) ⓘVršany mine, Most District, Ústí nad Labem Region, Czech Republic
18.1km (11.3 miles) ⓘMolchner Stolln (Molchner adit), Pobershau, Marienberg, Erzgebirgskreis, Saxony, Germany
References
H. Vollstädt, R. Baumgärtel: "Einheimische Edelsteine", 2nd. ed., Steinkopff (Dresden), 1977
 
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