Aegirina
Aegirina is a mineral with formula NaFe³⁺Si₂O₆, in the Inosilicatos group. This specimen comes from Monte Malosa, Zomba, Zomba, Malawi and joined the Terrium collection in 2025.
Description
Large prismatic, columnar, lustrous black crystal with a complete hexagonal cross-section and perfect termination. Shows a visible inclusion of a small honey-coloured zircon on one face.
About Aegirina
Aegirine is a sodium- and iron-rich alkaline pyroxene, common in alkali-rich igneous rocks. Its prismatic habit and hardness make it valued when well crystallised.
About the locality
One of the key aegirine localities—if not the most famous. Mount Malosa is renowned for its giant, perfect aegirine crystals. It is an alkaline igneous complex with cavities where fully developed crystals grow. Frequent association with zircon, arfvedsonite and eudialyte.
Technical data
- Catalogue No.
- 0091
- Composition
- NaFe³⁺Si₂O₆
- Name
- Aegirina
- Group
- Inosilicatos
- Category
- Estélites
- Associations
- zircón
- Mine
- Monte Malosa
- District / Municipality
- Zomba
- Province
- Zomba
- Country
- Malawi
- Size (cm)
- 14 x 1.8 x 1.2
- Weight
- 62.2 g
- Acquired
- 2025
- Ex-collection
- Diego Navarro
- Etymology
- It is named after the Norse god Ægir, in allusion to the submarine volcanic environment where it was first found.
- Quality
- Muy buena
- Value trend
- Estable
Related specimens
- Espodumena (Transparente) — Mozambique
- Wollastonita — España