Quartz with Fe-Mn oxides

Banská Štiavnica (Schemnitz), Banská Štiavnica District, Banská Bystrica Region  Slovak Republic (2009)

Specimen size: 8.3 × 6.4 × 3.5 cm = 3.27” × 2.52” × 1.38”
Main crystal size: 0.5 × 0.2 cm = 0.20” × 0.08”