Obsidin rock, or volcanic glass is non-porous.
Obsidian, volcanic glass, is quite non-porous.
Oil is found in certain formations of sedimentary rocks. Obsidian is an igneous rock, formed when lava cools extremely rapidly, and it isn't porous, so you wouldn't be likely to find oil in it.
Obsidian is a naturally occurring volcanic form of glass.
Obsidian
No. Obsidian is brittle.
Mahogany Obsidian
No. Obsidian is natural glass, mostly silica. Obsidian is of volcanic origin.
There are two types porous and non porous. You can also seel porous concrete to make it non porous.
There are two types porous and non porous. You can also seel porous concrete to make it non porous.
Obsidian is, itself, a mineral.
Obsidian is a natural glass.
Neither, obsidian is a glass.