Ivory or not Ivory? That is the question.

Hey again,
This heavier and chunkier bangle was one I picked up at a local charity shop. Under a loupe there are very few pockmarks; much less than the camel bone bangle I posted yesterday but there are lots of horizontal lines that are the same colour as the rest of it.
I'd like to add that my posting this is out of interest only. Modern Ivory trading is something I disagree with strongly and even antique Ivory dealing is a market abused by unscrupulous sellers, thus forcing the killing of more innocent animals and so on. Although I do sell bits and bobs I would never sell Ivory. I believe it's a beautiful and precious thing that should be kept safely in the hands of collectors as a reminder of how harsh humans can be for the sake of vanity and in memory of the poor animal it was procured from. I'd be interested to hear anybody else's view on this issue - of which I know only a little, to be honest.
If it does turn out to be Ivory I have no intention of selling it or gaining profit from it in any way; it will be kept with my eclectic collection of precious (to me anyway) collectables.
Anyway, I'm betting it'll turn out to be plastic - and I'll take the ribbing on the nose if it is - but I wanted to put it out there; I wouldn't want to offend anybody. Thanks for looking :))