I initially classified this specimen as actinolite, but after some doubts I analysed it using SEM-EDS and X-ray diffraction (XRD). The results indicate that it is an aegirine, probably after arfvedsonite (striated prism...). A very good-sized specimen, with different crystals growing in parallel, shiny, with striated faces, and a clearly visible green colour. Pieces of this quality are almost impossible to obtain today. We will send the analyses to the buyer.

Sold

A very good-sized specimen with an aggregate of brilliant aegirine crystals of an intense green, almost black colour, with well-defined faces and edges. It is accompanied by green fibrous crystals of arfvedsonite. They are disposed in a matrix of orthoclase crystals with quartz.

Reserved