Resource Overview History
Obsidian is one of the 31 rare resources. It appears as a small cluster of silverish rocks with some grey/yellow/green ground.

Like all rare resources on land, Obsidian can be gathered by sending a Merchant from the Market to the resource location. Obsidian provides the following benefits:

The gather rate of rare resources can be increased in various ways, as described in the main article. Note that Metal Metal and Knowledge Knowledge is not gathered until a nation has entered the Classical Age Classical Age (except for the Greeks who can gather Knowledge Knowledge at start) and linking a Obsidian resource while still in the Ancient Age Ancient Age might not provide the full benefit.