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It was liquid rock (magma) which solidified after an extrusion or eruption. Crustal rocks can re-dissolve into magma during subduction of oceanic crust.
Obsidian is a naturally occurring volcanic form of glass.
Obsidian
Mahogany Obsidian
No. Obsidian is brittle.
Because when you take chips off it, it becomes sharp. You could chip little bits off until it's the right shape, then the edges would be sharp. Many other rocks do this, and many other rocks were used. Obsidian is the most fragile of the bunch, just it's also the sharpest. In fact, properly sharpened obsidian is sharper than steel can be.
No. Obsidian is natural glass, mostly silica. Obsidian is of volcanic origin.
i cant say for sure but i seen it go for 59.99 before .
Obsidian is, itself, a mineral.
Obsidian is a natural glass.
Neither, obsidian is a glass.
yes obsidian is a crystal.