obsidian (gemstone)
A volcanic glass that forms when lava rapidly cools. Ranges from pitch black to dark brown. Known since antiquity, made into arrow (projectile)s and Macuahuitls. When it is not a piece of jewelry, use obsidian rock instead.
A volcanic glass that forms when lava rapidly cools. Ranges from pitch black to dark brown. Known since antiquity, made into arrow (projectile)s and Macuahuitls. When it is not a piece of jewelry, use obsidian rock instead.
