Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Behier (1960) describes a specimen with cobaltite that has been found by Picot (1957) at "Milanoa". Behier belives that this locality is the same as Mahasaborivaky.