101Leafy researched the games.
Ruststone
Looks like a lump of dirt, but it's actually rusted metal. Try polishing it...
Gathering
| Map | Area | Type | Quests | Chance |
|---|---|---|---|---|
| Jungle Zone | Area 10, point 1 | Mining | Latter quests | 1% |
| Desert Zone | Area 6, point 1 | Mining | Latter quests | 1% |
| Swamp Zone | Area 7, point 1 | Mining | Latter quests | 1% |
| Swamp Zone | Area 11, point 3 | Mining | Latter quests | 1% |
| Volcanic Zone | Area 3, point 2 | Mining | Latter quests | 1% |
| Volcanic Zone | Area 3, point 4 | Mining | Latter quests | 1% |
| Volcanic Zone | Area 4, point 3 | Mining | Latter quests | 1% |
| Volcanic Zone | Area 8, point 2 | Mining | Latter quests | 1% |
| Volcanic Zone | Area 8, point 3 | Mining | Latter quests | 1% |
| Volcanic Zone | Area 8, point 4 | Mining | Early quests | 1% |
| Volcanic Zone | Area 8, point 4 | Mining | Latter quests | 1% |