Cyclosilicate (ring silicate)
Specific gravity: 3.433
Colour: White, greyish white
Common impurities: Sr,Na,K,C
Roeblingite occurs in zinc-manganese ores and in
Precambrian metamorphosed sediments
To date (July 2020) it has been found in only two localities.
Associated minerals include garnet, titanite,
sphalerite, rhodonite and
At Långban, Filipstad, Värmland County, Sweden, roeblingite occurs as fracture ̄fillings in a metamorphosed iron-manganese orebody (HOM).
At the type locality, the Parker shaft, Franklin Mine, Franklin Mining District, Sussex county, New Jersey, USA, roeblingite was found as compact masses of minute prismatic crystals, in a highly altered zone in a zinc-manganese-iron silicate-oxide orebody, in or near the limestone-granite contact. Associated minerals include axinite, willemite, hancockite, ganophyllite, clinohedrite, datolite, baryte, andradite, arsenopyrite, sphalerite, titanite, rhodonite and rhodochrosite (AM 51.504-508, Mindat).
Back to Minerals