This looks like a furnace wound bead, made in the area of Purdilpur, India.
Is the hole about 5 to 6 mm with black residu? In that case, I’m pretty sure. If not, I’d need more pictures to know.

thanks so much , it is exactly what you say : 5mm hole and traces of burning . sorry again , my computer doesn't want to send the the pictures ,even when they are reduced .
But , the question is ( for me ) : why make so heavy beads , around 100 gr ? are they related to antique Naga shell beads , made to replace them , just as big amber and coral beads in tibet are copied in resin ?