The chain of

Glass

Cityworth0.5 S

Sand DunesSand Pit21 : 1Coal SeamCoal Mine1or1 : 1½GlassworksGlass6/min

The buildings, in order

1. Sand Dunes
2. 1Sand Pit
3. 2Coal Mine
4. 3Glassworks
5. Glass

Built from the game’s rules, data 0afab9b0.