OSM tag name=Mussel Rock matches Mussel Rock in these Wikidata fields:
| Islands of Northern California | admin_level, boundary=administrative, place=islet, place=island |
| Islands of San Mateo County, California | admin_level, boundary=administrative, place=islet, place=island |
| Islands of the San Francisco Bay Area | admin_level, boundary=administrative, place=islet, place=island |
| Pacific islands of California | admin_level, boundary=administrative, place=islet, place=island |
| Rock formations of California | natural, landmark |
| Uninhabited islands of California | admin_level, boundary=administrative, place=islet, place=island |