Sanidine

From Itrongay, Betroka Dist., Anosy, probably from the early 1900s.

Ex. Luis Leite (1942-1999), Portuguese-South African after whom leiteite is named, then ex Jack Halpern. Featured in the book Addicted to Beauty: The Legacy of Jack Halpern (Mineralogical Record, March 2025) on page 129, fig. 129.