Obsidian used in a sentence

Obsidian in a sentence as a noun

In my last game I built an engraved obsidian cast tower.

'Shiny' objects in volcanic fields are typically obsidian or some other form of basaltic glass.

Or torn out a single segment and them opened another portal, thereby creating two portals in the Nether and another whole portal worth of obsidian... that's just my experience with portals from many many months ago, though.

In Dwarf Fortress terms this means I built a powered pump system to extract magma from the earth and water from a nearby river and used the water and magma to cast obsidian for a stone tower which I then hollowed out with rooms and storage areas as a dwelling place for my dwarves.

For example, you might decide that you want to create potions, for this you need netherwart, which you can only get from the nether realm, but to get to the nether realm you need obsidian, which can only be mined using diamond tools, so you start off by deciding to get diamond tools and mining some obsidian.

Besides creating electricity, there are many potential industrial uses of magma:"Magma serves as a heat source, replacing fuel in magma smelters, magma forges, magma glass furnaces, and magma kilns...Other uses for magma include obsidian farming, trap design, melting ice, igniting fires, and even garbage disposal.