FELDSPAR

Aegirine Crystal Feldspar cluster.  Lovely lustrous hard black crystals and contrasting white Albite combined in one specimen.  An amazing crystal, that looks even better in person.  The main crystal is quite wide and there are several distinct crystals also growing alongside.  Interesting combination of two metal sodium silicates from nature.  A great collector piece and an interesting and less common mineral.

Location:
Mount Malosa, Zomba Valley, Malawi.

Dimensions:
10.6cm x 1cm x 1cm, 16g.

Aegirine
Sodium Iron Silicate
NaFe³⁺Si₂O₆

Albite
Sodium Aluminum Silicate
Na(AlSi₃O₈)