Is it possible to create artificial rock types?

[Isilder]

@MrDibble

This isn’t really true. Obsidian is a glass, true enough, but glass as we colloquially mean it doesn’t have anything like the composition of obsidian - obsidian is an Fe-Mg silicate glass, whereas ‘glass’-glass is most often a Ca/Na silicate glass, a pure quartz glass, or the speciality types like borosilicates, lead crystal, fibreglass and fibre-optic glass.

Thats just nit picking. It was left to the reader to throw some Fe and Mg into artificial glass and make it artificial Obsidian…