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Exceptionally well-crystallized zinc-bearing rhodonite was a locally abundant gangue mineral at Franklin and, to a lesser extent, Sterling Hill, Sussex County, New Jersey.
It is a gangue mineral in ores from the Star, Hobo, and Princess mines at Central, Grant County.
The main gangue minerals that make up the vein are massive white calcite, quartz, and prehnite.
Specifically, gangue formed by both metasomatic alteration and precipitation during ore formation can yield a wealth of information about the origins and physical conditions of the ore-forming fluids.
The fluorite is typically a gangue mineral and is only locally recovered as an ore.
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