7/23/2023 0 Comments Green obsidian from mexico![]() Over time, it became a highly integrated material in daily and ritual life, so much so that its use is often touted as a reason why the Mesoamericans lacked advanced metallurgy skills. Felsic lava cools down at a fast rate and forms into a crystalline volcanic glass that turns into a variety of colors: ranging from black and grey to green and blue, depending on the location where it was formed. It is rich in the lighter elements like silicon, oxygen, aluminum, sodium, and potassium, as it comes from felsic lava. Obsidian is a type of black volcanic glass, formed when lava cools after coming out of a volcano.
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