Aegirine - Pyroxene Group.
 
 
From: Malosa Mts., Zomba, Malawi.
 
 
Subhedral, prismatic, monoclinic, dark green, opaque crystals of Aegirine, covered with small white prisms of potassium Feldspar. Formed in an alkaline pegmatitic environment. Sample measuring 4.5 x 3.0 x 2.0 cm and weighing 23 g.