Template:POTD/2023-09-24

Picture of the day

Aegirine is a member of the clinopyroxene group of inosilicate minerals. It is the sodium endmember of the aegirine–augite series, and has the chemical formula NaFeSi₂O₆, in which the iron is present as the ion Fe³⁺. Aegirine occurs as dark green monoclinic prismatic crystals. This photograph depicts aegirine crystals with minor feldspar found at Mount Malosa in Zomba, Malawi.Photograph credit: Ivar Leidus