| Lake Grubependity | Russia | 2 |
| Lakeview | United States | 2 |
| Las Asperezas mine | Argentina | 2 |
| Letitia Lake | Canada | 2 |
| Lichtenberg open pit | Germany | 2 |
| Lubero Territory | Democratic Republic of the Congo | 2 |
| Lupikko iron mine | Russia | 2 |
| Lydenburg | South Africa | 2 |
| Malkhan pegmatite field | Russia | 2 |
| Malyi Murun massif | Russia | 2 |
| Malysheva mine | Russia | 2 |
| Mammoth | United States | 2 |
| Maoniuping mine | People's Republic of China | 2 |
| Marjalahti meteorite | Russia | 2 |
| Massa | Italy | 2 |
| Mbobo Mkulu cave | South Africa | 2 |
| Mesabi Range | United States | 2 |
| Mesamax Northwest deposit | Canada | 2 |
| Mesopotamia mine | Namibia | 2 |
| Michałkowa | Poland | 2 |
| Minamiboso | Japan | 2 |
| Minamichiyoda | Japan | 2 |
| Misato | Japan | 2 |
| Mogok Township | Myanmar | 2 |
| Monche-tundra | Russia | 2 |
| Mount Blanco mine | United States | 2 |
| Mount Calvario, Biancavilla | Italy | 2 |
| Mount Cavalluccio | Italy | 2 |
| Mount Cleveland tin mine, Luina | Australia | 2 |
| Mount Dupezeh, Hero | Iraq | 2 |
| Mount Keith mine | Australia | 2 |
| Mount San Cristóbal | Mexico | 2 |
| Mount Selsurt | Russia | 2 |
| Mount Sengischorr | Russia | 2 |
| Mount Takhtarvumchorr | Russia | 2 |
| Muonionalusta | — | 2 |
| Mutnovsky | Russia | 2 |
| Nepskoe potassium salt deposit | Russia | 2 |
| Neustädtel | Germany | 2 |
| New Cornelia mine | United States | 2 |
| New Goose Creek quarry | United States | 2 |
| Noda-Tamagawa mine | Japan | 2 |
| North Star | United States | 2 |
| Novaya fumarole | — | 2 |
| Novo Horizonte | Brazil | 2 |
| Nördlinger Ries | Germany | 2 |
| Oceanus Procellarum | — | 2 |
| Oka | Canada | 2 |
| Oms | France | 2 |
| Ore Mountains | Germany | 2 |
| Otto mountain | United States | 2 |
| Ottré | Belgium | 2 |
| Ouro Preto | Brazil | 2 |
| Owyhee Dam | United States | 2 |
| Panasqueira | Portugal | 2 |
| Pandora mine | United States | 2 |
| Petrogale Cave | Australia | 2 |
| Phlegraean Fields | Italy | 2 |
| Piława Górna quarry | Poland | 2 |
| Placer occurrences (Yanshan meteorite) | People's Republic of China | 2 |
| Plavno mine | Czech Republic | 2 |
| Poruba pod Vihorlatom | Slovakia | 2 |
| Poços de Caldas | Brazil | 2 |
| Rabejac, Lodève | France | 2 |
| Rappold mine | Germany | 2 |
| Ratnapura | Sri Lanka | 2 |
| Ravat Kishlak | Tajikistan | 2 |
| Redington mine | United States | 2 |
| Repete mine | United States | 2 |
| Rockport | United States | 2 |
| Rothenberg basalt quarry | Germany | 2 |
| Rustenburg | South Africa | 2 |
| Sadamisaki Peninsula | Japan | 2 |
| Saiki | Japan | 2 |
| San Antonio de Zapiga | Chile | 2 |
| San Genaro mine | Peru | 2 |
| San Pietro Mussolino | Italy | 2 |
| Santa Cruz | United States | 2 |
| Sapucaia do Norte | Brazil | 2 |
| Sasso Pisano | Italy | 2 |