Collecting Bog Iron from Marshland — Extracting Iron Ore from Wetlands

Locate a marshy area where slow-moving groundwater drains through iron-rich soil — look for permanent wetlands with rusty water

Look for orange-brown staining on stones, roots, and mud at the water's edge

Check for thin iridescent films on standing water — this rainbow sheen indicates dissolved iron oxidising at the surface

Push a wooden pole into the marsh bed to test for a firm layer of ochre-coloured sediment 30-50 cm below the surface

Dig into the iron-rich layer with a shovel or digging stick, scooping out dark rust-coloured mud

Pull out lumps of dark, rust-coloured bog ore — limonite nodules range from pebble-sized to fist-sized

Rinse each lump in clean running water to wash away mud, roots, and organic debris

Sort the ore — keep dense, heavy pieces that ring when struck; discard light, crumbly, or porous ones

Break larger lumps into fist-sized pieces with a hammerstone to speed drying

Spread the ore pieces on flat stones in direct sunlight and leave for 2-3 days to air-dry

Turn the pieces once daily to ensure even drying on all sides

Build a small open fire and let it burn down to a strong bed of coals

Place dried ore chunks around the fire perimeter and roast for 1-2 hours to drive off remaining moisture

Listen for cracking and popping sounds — this indicates chemically-bound water escaping from the ore structure

Remove roasted ore from the fire area and allow it to cool completely before handling

Crush the roasted ore into walnut-sized fragments with a hammerstone on a flat stone anvil

Sift the crushed ore through a coarse basket to separate fine powder from the usable fragments

Store the processed ore in a dry container — it is now ready to charge into a bloomery furnace for smelting