At present, there are over 350 CONFIRMED species on this list. The mineral list on this page is maintained under a strict protocol to ensure its integrity and credibility. The boundaries of the Franklin District are strictly defined (Eastern boundary: bases of Sparta Mt & Hamburg Mt Western boundary: eastern edge of the Wildcat Band of marble northward until it plunges beneath the unconformity, then, northerly along the Wallkill River the southern boundary: Brooks Flat Road, an East-West road at the southern margin of Ogdensburg borough and, the northern boundary: an East-West line from the intersection of state route 23 and county route 517 (Quarry Road) in Hamburg Borough at the Franklin borough-Hamburg borough line (an area formerly called Hardistonville) westward to the Wallkill River) (Dunn, P.J. The proponent for the official list is the Curator, Franklin Mineral Museum, Franklin, NJ 07416. This page contains the complete official list of species that occur within the District's boundaries. The Franklin Mining District is located in rural Sussex County, New Jersey, some 45 miles NW of New York City.

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