Fluoro-potassic-magnesio-arfvedsonite 1.29 ct.

Fluoro-potassic-magnesio-arfvedsonite

Is one of the many amphibole with formula [(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2] and hardness of 5.5-6.Dark bluish fibrous acicular vein-like aggregates, very rich in a 1,4-billion years old Shonkinite matrix. The name Fluoro-potassic-magnesio-arfvedsonite is the longest of all mineral names; it comes from Mountain Pass Mine, Clark Mts., San Bernardino Co., California / USA

Size: 7.2x7.2x4.5 mm.

Weigth: 1.29 ct.

CODE#7690