Phil in SF quoted The Housekeepers by Alex Hay
Mrs. King is no ordinary housekeeper. Born into a world of con artists and thieves, …
Mrs. Bone used to truss herself in her vulcanite and black bog oak beads and sit on a bench in Regent's Park, going over and over the process: gently, girl, like your fingers are made of air… she always said she had great expectations of Dinah.
— The Housekeepers by Alex Hay (Page 194)
I know what vulcanite is, but the context here confuses me. Did people used to have clothing made from vulcanite??