I was wondering if this was considered a jade insulator? I know sometimes colors can be tricky to nail down and was looking at this one and wondered about it.
I honestly have no idea. I thought it was on the outside after your picture but I washed it and cleaned it and it still looks like this. So I took a picture of it with something else.
Tough to say without seeing it. Looks like it was dug. Could have a haze from being buried. Only way to get a haze off is to tumble, it wouldn't wash off.