Aegirine - Pyroxene Group.
  
From: Monte Malosa, Zomba, Malawi.
  
Aggregate of elongated or acicular prismatic crystals of Aegirine up to 3 cm long on prismatic crystals of Feldspar K. Sample measuring 5.5 x 5.0 x 4.5 cm and weighing 109 grams. Formed in an alkaline pegmatite context.