I think it could be a piece of volcanic glass or a very large piece of amber. First from a volcanic eruption and the second from sap of a tree that has fosilized.
Looks like a layer of sedimentary rock has peeled off of the base layer. The lines in the base are reminiscent of rock that has been scrubbed by a glacier.
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Is it a knot from a Redwood Tree in Redwood Forest CA?
It is not, but now that you mention it, I can see the similarities....
It is fire wound on the tree.
Afraid not.
I think it could be a piece of volcanic glass or a very large piece of amber. First from a volcanic eruption and the second from sap of a tree that has fosilized.
Is it petrified piece of wood in the Petrified Forest National Park?
Looks like a layer of sedimentary rock has peeled off of the base layer. The lines in the base are reminiscent of rock that has been scrubbed by a glacier.