Coronadite

TSNB650
Specimen
Innes, J.Pinch, W.W.
Exhibit 1. Coronadite; 49 mm.
Exhibit 1. Coronadite; 49 mm.
Image Credit: Malcolm Southwood
Exhibit 2. Coronadite; 49 mm.
Exhibit 2. Coronadite; 49 mm.
Image Credit: Malcolm Southwood
Exhibit 3. Specimen label (Bill Pinch).
Exhibit 3. Specimen label (Bill Pinch).
Image Credit: MGMH Archive
Exhibit 4. Specimen label (John Innes).
Exhibit 4. Specimen label (John Innes).
Image Credit: MGMH Archive
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Specimen Title

Coronadite

Associated Minerals

calcite (?)

Principal Mineral

Coronadite

Size

Miniature; 49mm

Location in the Mine

35 Level; South East Stope

Provenance

Innes, J.; Pinch, W.W.

Collection

MGMH; 2020.7.2009

Collected by

John Innes; 1981

Entry Number

Specimen; TSNB650

Description

A cavernous intergrowth of coronadite dendrites (individually to 7 mm) with a micro-botryoidal structure. Broken surfaces reveal concentric structures of grey and black coronadite, colloform-like in texture (Exhibit 2). Minute, colourless rhombs (to 0.2 mm) of calcite (?) are present on many of the coronadite dendrites, lending a sparkle to the specimen and contributing to a variously coloured surface patina.

The specimen was formerly in the Pinch Collection (Exhibit 3); it is accompanied by a label hand written by John Innes (Exhibit 4), chief mineralogist at Tsumeb in the early 1980s, recording that he collected it from the South East Stope on 35 Level in 1981.