Adular from Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland. Comes with certificate of authenticity. Average weight (Carats): 150.5 carats. Dimensions (mm): 52 x 36 x 27 mm. Ref. : SKU050650. Adularia is a variety of orthoclase, silicate group, tectosilicate subgroup, feldspar family. Pale yellow in color with bluish reflections, it is present in plutonic and metamorphic rocks.
