Adamite (w. anglesite, feinglosite and mimetite)

TSNB910
Specimen
Gauthier, G.Melville, P.Pietsch, A.Sussman, M.Veevaert, J.
Exhibit 1. Adamite (w. anglesite, feinglosite and mimetite); 67 mm.
Exhibit 1. Adamite (w. anglesite, feinglosite and mimetite); 67 mm.
Image Credit: Malcolm Southwood
Exhibit 2. Adamite (w. anglesite, feinglosite and mimetite); 67 mm.
Exhibit 2. Adamite (w. anglesite, feinglosite and mimetite); 67 mm.
Image Credit: Malcolm Southwood
Exhibit 3. 42 mm field of view.
Exhibit 3. 42 mm field of view.
Image Credit: Malcolm Southwood
Exhibit 4. 36 mm field of view.
Exhibit 4. 36 mm field of view.
Image Credit: Malcolm Southwood
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Specimen Title

Adamite (w. anglesite, feinglosite and mimetite)

Associated Minerals

anglesite; feinglosite; mimetite

Principal Mineral

Adamite

Size

Cabinet; 67mm

Location in the Mine

Second oxidation zone; 35 Level (?); North East Stope (?)

Provenance

Pietsch, A.; Gauthier, G.; Sussman, M.; Veevaert, J.; Melville, P.

Collection

Southwood, M.; MS2025.051

Collected by

John Innes (?); February 1980 (?)

Entry Number

Specimen; TSNB910

Description

A very dense specimen comprising a little grey-black massive sulphide (exhibits 2 and 3), veined and encrusted with off-white to very pale yellow-green secondary minerals comprising a fine-grained mixture of adamite, anglesite, feinglosite and mimetite (all XRD / EDS verified). The display face consists of three-dimensional mounds of tabular, petalloid crystals of pale-green adamite (Exhibit 4) - a very unusual habit for this mineral at Tsumeb. Immediately underlying the adamite on the display face is a cavernous layer of intergrown white anglesite crystals with colourless, striated prisms of mimetite (< 1 mm) in the cavities. 

The specimen was purchased from Australian collector Paul Melville in August 2025. It was originally in the collection of Tsumeb baker Toni Pietsch and belonged subsequently to Gilbert Gauthier and Marshall Sussman. Melville acquired the specimen from John Veevaert (Trinity Minerals) in 2003.
The distinctive habit of the adamite and the paragenesis are an exact match for material collected in February 1980 by TCL mineralogist John Innes from the North East Stop on 35 Level, so that this specimen is believed to be from the same occurrence. (See also TSNB468.)

XRD analyses were conducted by John Rankin (Sydney, Australia) and Paul Carr (University of Wollongong). EDS analysis was conducted by Frank Keutsch (Harvard University).