Gold (Var: Electrum), Galena, Sphalerite, Pyrite, Quartz
Koryu mine, Ishikari Subprefecture, Hokkaidō Prefecture, Japan
Ragged aggregate of silver-rich gold (bright-yellow), with inclusions of sphalerite (dark-grey), in association with pyrite (crème) and galena (medium-grey) in porous quartz matrix (almost black). Reflected plane polarized light digital image in air. Width of image 0.5 mm.
Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold