“SEM view of well-crystallised octahedral galena crystals on micro-crystalline silica. Galena crystals have a strong silver colour and silica micro-crystalline balls are blue. Found in massive sphalerite samples rich in small pockets of galena and silica.”

“SEM view of well-crystallised octahedral galena crystals between a large sphalerite crystal and a micro-crystalline silica ball. Galena crystals have a strong silver colour and silica micro-crystalline balls are blue. Found in massive sphalerite samples rich in small pockets of galena and silica.”