Aegirine - Pyroxene group.
 
 
From: Montes Malosa, Zomba, Malawi.
 
 
Subhedral Aegirine primatic crystal, opaque dark green, vitreous to adamantine luster, with some twinning of smaller crystals, covered with small white prisms of K-feldspar. Formed in an alkaline pegmatitic environment. Sample measuring 4.0 x 3.2 x 2.5 cm and weighing 26 g.