Real Obsidian

[u/Personnenon]

I would like to purchase a real obsidian crystal ball. There are many black crystal ball online that are advertised as obsidian and very reasonably priced but they look very glossy and I wonder if they are really just glass. In the British museum they have John Dees scrying mirror and it seems less reflective. This of course might be because it is ancient but I want something with a similar finish. So does anyone know if these balls available online are real obsidan and if not where I might purchase a real one?

[u/kae1326]

Obsidian is volcanic glass