Complex sentence: In many Maya excavations evidence of obsidian is likewise found most frequently in privileged settings; as the Late Classic period progressed, obsidian changed from an elite item to one found in abundance among the lower classes of Maya civilization.
Split into simpler sentences: In many Maya excavations evidence of obsidian is likewise found most frequently in privileged settings. As the Late Classic period progressed, obsidian became increasingly accessible to the lower classes of Maya civilization.