| Kennebec County | ||
| Litchfield | cancrinite | |
| Oxford County | ||
| Black Mountain | roscherite | |
| Emmons Quarry | perhamite | |
| Mount Mica | hydroxylherderite, kosnarite, lepidolite, pollucite | |
| Newry | alluaudite, gainesite, montebrasite, petalite, purpurite, triphylite | |
| Paris | cookeite | |
| Songo Pond Mine | beryl | |
| Stoneham | beryllonite, reddingite, triphylite | |
| Tamminen Quarry | montmorillonite | |
| Walsonen Quarry | hydroxylherderite | |
| Piscataquis County | ||
| Moxie pluton | ferrosilite | |
| Sagadahoc County | ||
| Coomb's Quarry | ferrocolumbite | |
| Topsham | gahnite, microlite | |
| York County | ||
| Goodall Farm Mine | anorthite, vesuvianite | |