HELPL What role did jade and obsidian play in the Mayan economy?

Jade and obsidian were traded for food that could not be grown in the rugged highlands.
Jade and obsidian were melted down to make metal weapons and tools for farming and building.
Jade was used to make art and jewelry, while obsidian was used to make art and weapons.
Jade was traded for other precious minerals like gold and silver, while obsidian was traded for advanced weapons.