Is Glass a Liquid?

By jamie

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6. Obsidian

One type of glass occurs naturally and has been occurring long before mankind was on the planet. One such example if this is obsidian. Obsidian is made directly from lava that is released during a volcanic eruption. Lava won’t usually transform into obsidian but will do so when it is made to cool down rapidly enough.

Although obsidian is a true glass, it won’t be much good as a window because it is black and not transparent. Obsidian is also quite common so has little value, but this is also a good thing because it is inexpensive to buy. Regardless of price, it is still very attractive and is often used in making jewelry.

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