I found this item on the kent coast and i have no idea what it is. If anyone could shed some light on it id be very greatful
I have next-to-no ideas - it looks a bit like a septarian nodule, a bit like a trace fossil, a bit like net veining.
Is the pale material chalk?
Is the dark material mineral or metal (test to see if it has any attraction with a magnet, test to see if it conducts electricity (be sensible)).
Was there just the one piece? If not, what were the other pieces like?
The pale material is not chalky feels more like a sand stone material. There is no metal content i found it while i was metal detecting so i checked it with the detecter when i saw it. There was nothing else like it around that i could see so i think it was a singular piece.
Great find, I would have taken this home as well, very intersting.
I think the veins in the matrix are made from iron pyrites and the matrix is softer than the pyritic veins, so they stand out as harder than the matrix.
I agree with Mike when he say's it looks a bit like a septarian nodule but with pyritic veins instead of quarts vains.
But wouldnt iron pyrites be indicated on a metal detector? The veins do have the surface characteristics of some pyrites i have which made me start thinking along the volcanic lines but when you see the object up close you cant help thinking of an insect chrysalis its really strange and organic looking, but at 3" long hard to place reality in that theory.
Pyrite will register on a metal detector only on very low frequency, maybe (judging by what I found through Googling). It could be pyrite veining. I'm tempted to suggest you try scratch testing it, but it is clearly not made of large individual crystals, so the result could be ambiguous (you could seem to be scratching it while actually breaking off tiny crystals instead).
The veins are clearly harder than the host rock, and maybe why we see this lump at all is just a chance higher-concentration of veins, hence greater resistance to erosion.