Bangle has name but I dont know it

[abbeyrock3]

Bangle has name I think they are shells but I dont know it If anyone knows i would greatly appreciate it. It is on an elastic thread.  I spent long time looking at shell pictures but couldnt find a match. Thanks 

[kopenhagen5]

Maybe these ? - https://www.niwa.co.nz/news/summer-series-4-beautiful-sea-shells-on-the-sea-shore

But it's also possible they are from any type of shell and simply shaped into a teardrop shell. Maybe from pearl shell.

[imastawka]

I think they are simply carved Mother of Pearl shells.

https://www.google.com.au/search?q=mother+of+pearl+shell+teardrop&tbm=shop&source=lnms&sa=X&ved=0ahU...

Not worth a great deal.

[lyndal1838]

I believe you are thinking of capiz shells but I think they are too thick for that.

I am inclined to go with Stawkas idea....they are just mother of pearl carved into that shape.