A V3+-bearing variety of Aegirine. A member of Aegirine-Natalyite series with V2O3 content up to 4 mas.%.
Described by H. Sjogren in 1897 from Libby, Lincoln Co., Montana, USA.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.