The most spectacular piece is a combination specimen of sphalerite, quartz, andradite and hedenbergite
over 25 cm in diameter.
Trachytes (CR 580) contain hedenbergite
and abundant alkali feldspar phenocrysts in a groundmass with hedenbergite
microlites and recrystallized feldspar and quartz.
1998, Equilibria among titanite, hedenbergite
, fayalite, quartz, ilmenite and magnetite: experiments and internally consistent thermodynamic data for titanite, Amer.
The veins are surrounded by a 5- to 10-cm-wide alteration zone that consists of calcite, dolomite, diopside, hedenbergite
, vesuvianite, and base-metal sulfides.
The stockworks consist of small veins and veinlets composed of quartz, orthoclase, hedenbergite
and sulphides, principally pyrite.
and ilvaite skarn mineralization is common within the massive sulfide zone.
Associated species of note include quartz, calcite, wollastonite, hedenbergite
, "garnet" (andradite-grossular), fluorapophyllite and manganaxinite.
1987; Eby 1990), as no fayalite or sodic hedenbergite
that typify "classic" A-type granite occurs in the MPG.
Von Bezing (2006) reports platy yellow hedenbergite
crystals in calcsilicate marble from the Tubussis 22 andradite locality west of the Erongo Mountains.
The associated gangue minerals for the base metal ores are axinite, hedenbergite
Associated minerals include pellyite, barite , hedenbergite
, quartz, andradite, titantaramellite, gillespite, sanbomite, muirite, UK-10, chalcopyrite and witherite (Montgomery et al.
have yielded excellent minerals typical of skarn deposits (epidote, amphibole, hedenbergite
, andradite-grossular, magnetite etc.