Thank you Rosanna, I have already tried to warm the hole, but it won't burn easily, I've also tried burning the whole bead, but doesn't melt. I just wanted to know if anyone knew about new fakes being made in China with this look.

The thing is that it smells like natural resin, but you also said that chinese are adding pine oil to synthetic resin, and that is what I have suspected.

And I've been offered such a big amount that it is not possible that they are all real amber with this big sizes!