Image Credit: Malcolm Southwood
Image Credit: Malcolm Southwood
Image Credit: RRUFF Database Project (Lafuente et al. 2015; RRUFF ID 110032)
Image Credit: Malcolm Southwood
Image Credit: Malcolm Southwood
Title
köttigite (w. ludlockite)
Principal Mineral
Size
Miniature; 43mm
Location in the Mine
Third oxidation zone; 44 Level
Collection
MGMH 2020.7.678
Provenance
Innes, J.; Gartrell, B.; Pinch, W.W.
Entry Type
Specimen TSNB526
Description
A shard of cavernous massive sulphide ore, with several vugs containing sprays of bright orange acicular ludlockite crystals. One of the larger cavities hosts a spray of pale blue acicular köttigite crystals (to circa 1 mm), flanked by two contrasting sprays of ludlockite (exhibits 2 and 3). The matrix consists predominantly of tennantite and chalcocite with accessory quartz; well-formed microcrystals of chalcocite are present at the margins of some of the vugs.
The specimen is from the Pinch Collection (Exhibit 4); it belonged originally to TCL mineralogist John Innes and subsequently to Australian collector Blair Gartrell (Exhibit 5), whose collection was dispersed by Australian dealer Rob Sielecki in the mid 1990s. The specimen is from 44 Level in the third oxidation zone.
The köttigite has been verified by the RRUFF Project using single crystal XRD and its Raman spectrum is a RRUFF project standard for köttigite (RRUFF ID 110032). Raman and XRD spectra are available from https://rruff.info/kottigite/display=default/R110032; accessed November 2024).
Associated Minerals
chalcocite; ludlockite; quartz; tennantite-(Zn)
