the.com/ankerite
a chameleon mineral that swaps its iron for magnesium and never tells you when
means Ankerite is a calcium-iron-magnesium carbonate mineral, part of the dolomite group, where iron and magnesium substitute for each other in varying amounts.
from Named in the 19th century after the Austrian mineralogist Matthias Joseph Anker, with the standard mineral suffix '-ite' (from Greek '-ites,' meaning 'of the nature of'). So the name is simply 'Anker's stone' — a quiet honor pressed into rock.
- chemical disguise
- iron-rich cousin of dolomite, always swapping metals
- named for
- Austrian mineralogist Mathias Joseph Anker, 1825
- goes brown
- weathers rusty as its iron oxidizes outside
- gold company
- often haunts the same rocks as gold ore
- slow fizz
- barely reacts to acid unless powdered or heated
for instance
ankerite in siderite deposits — iron carbonate mineral found in cumbrian iron ore deposits, england, containing calcium and magnesium
ankerite in hydrothermal veins — carbonate mineral associated with gold deposits in the carlin trend, nevada, usa