After watching a few videos about the precise conditions for bacterial bog iron to form deposits: Swamp area with spring water. Acid soil. Plenty of aquatic plant life to supply oxygen. Characteristic bacterial slicks on the water that look a bit like oil rainbows on water. I realized the low depression of land in the bushland 100 metres behind my house met all the criteria. The area is 12" underwater with rain run off for four+ months of the year when reeds grow abundantly and they even give off small streams of oxygen in the water like a fine stream of champagne bubbles. The dried clay mud like deposit is a tan orange when all other soil in the area is black acidic sandy soil. So today I took a plastic pail and grabbed a few clay soil samples four inches below and 12 inches below the surface. It varies from very dark brown on the surface, to grey with orange chunks. I put some wet grey clay sample in a glass jar and mixed it thoroughly with water and put a neodymium magnet on the side of the jar: no attraction whatsoever. After a similar sample was calcined in a small firebrick furnace with my blowtorch for heat, I noticed the hot clay was partially melted and bits could be pressed together in the flames and stick to each other. After cooling, the hottest part was black and the rear area away from the flame was brown, it was solid lump that took a bit of effort to break up and crush to powder. At this point the calcined mud had about 20% of the total become magnetic and be able to separated from the rest: Success!!. At this point , I'll try and reduce a calcined sample with powdered coke, and later down the track I can induce a brain snap with certain forum members by actually doing some "smelting" of iron ore . I wonder what the market is for authentic ingots of "Bog Iron" amongst the blacksmith crowd?.