12.The researchers described the obsidian tools they found as smaller, of better quality, and more specialized than larger stone tools used by earlier human species.
14.But you got to remember that it wasn’t just any stone they had, they had obsidian. And umm... obsidian is a black, volcanic, well, almost like glass.
15." ... obsidian, " said the other man in the room, a pale, fleshy, pasty-faced young fellow with round shoulders, soft hands, close-set eyes, and food stains on his robes.
16.Obtaining obsidian was a core part of the Olmecs' trade during their entire civilization, although it later expanded to include luxury items like jade and animal pelts for the elite.
17.Traders ferried in flint and obsidian from Guatemala and " artisans were able to model stucco in a very advanced stylistic manner, " says archaeologist Carlos Miguel Varela Sherrer, field chief of the site.
18.Sam had almost forgotten about the wildlings, so much had happened since. " The children of the forest used dragonglass blades, " he said. " They'd know where to find obsidian" .
19.Shipton's team's excavation of the shelters at the Kelo site unearthed a volcanic glass substance called obsidian, which must have been brought over from another island, as there is no known source on Obi.
20.The king gave that a curt nod, as if to say he knew and did not care. " You slew this creature with an obsidian dagger, I am told, " he said to Sam.