Image Credit: Malcolm Southwood
Specimen Title
adamite (w. smithsonite)
Associated Minerals
smithsonite
Principal Mineral
Size
Cabinet; 58mm
Location in the Mine
Second oxidation zone (?)
Provenance
Wilbur, D.
Collection
MGMH; 117903
Entry Number
Specimen; TSNB387
Description
Blocky, yellow-green crystals of adamite (to 25 mm) associated with sheaf-like sprays of white smithsonite (XRD confirmed).
Quantitative (WDS) analysis of a near-identical specimen from the same occurrence determined that the adamite is close to end-member composition with a Zn: Cu ratio of 1.98:0.01 (APFU) (see Southwood et al. 2020).
The specimen was acquired by MGMH from American collector Dave Wilbur in 1979. It is believed to be from the second oxidation zone, and probably from the occurrence which Key (1977) considered to have produced Tsumeb's finest adamite specimens.
