ROSASITE
Like aurichalcite, rosasite is a zinc copper
hydroxycarbonate mineral, but the chemical formula is slightly different
((Cu,Zn)2CO3(OH)2). Rosasite tends to
form turqoise-colored, subrounded masses of tiny crystals.
Rosasite
clusters (pale blue) on iron hydroxy-oxide gossan matrix (field of view ~3.5 cm
across), from an oxidized carbonate replacement deposit at the Ojuela Mine,
Mapimí, northeastern Durango State, northern Mexico.
Rosasite
(field of view ~1.6 cm across)