Mineral: Quartz (variety smoky)
Locality: Giuv glacier (Giuv Gletscher), Val Giuv, Tujetsch (Tavetsch), Vorderrhein Valley, Grischun (Grisons; Graubünden), Switzerland
Dimensions: 89 x 55 mm
Description: A double terminated crystal of 70 mm.
All pictures, text, design © Forum FMF 2006-2024