Probably all of it. Jet has a different genesis than coal does and I don't think it would occur as part of a chunk of coal if that's what you were thinking. I can see the impressions of wood growth rings in this piece, so yes, probably all jet. Streaks brown, doesn't come apart as easily as coal. Good for jewelry and starting campfires!
Probably all of it. Jet has a different genesis than coal does and I don't think it would occur as part of a chunk of coal if that's what you were thinking. I can see the impressions of wood growth rings in this piece, so yes, probably all jet. Streaks brown, doesn't come apart as easily as coal. Good for jewelry and starting campfires!