Mineral: Cassiterite with Quartz
Locality: Viloco Mine, San Antonio Section, Loayza Province, La Paz Department, Bolivia
Dimensions: 11 x 8.5 x 4 cm / main crystal: 3 cm

Description: Mass: 557 g MIM number: 1714 Plate covered with very shiny cyclically twinned crystals which appear black, but show golden translucent areas when light passes through. Small quartz crystals with filamentous black inclusions are interspersed with the cassiterites. Photographer: AINU / Augustin de Valence

All pictures, text, design © Forum FMF 2006-2025