ARCHAEOLOGISTS IDENTIFY OBSIDIAN MINES EXPLOITED BY THE PEOPLE OF TEŌTĪHUACĀN (Heritagedaily 09/30/2022)
Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Due to the hard and brittle nature of the stone, it fractures to form extremely sharp edges, often used as cutting and piercing tools, instruments for worship, or for weapons manufacturing by the pre-hispanic groups living…