Where to Find Calcite in New Jersey

New Jersey calcite is famous for its fluorescence at the Franklin and Sterling Hill zinc deposits in Sussex County. Franklin Marble calcite glows red under short-wave ultraviolet light, often with green willemite associated, and the Buckwheat dump and Mineral Museum collecting field are the standard public access points. Crystal habit is mostly cleavable masses, though tabular and scalenohedral crystals turn up in vugs of the franklinite-willemite ore. Trap-rock quarries through Hudson and Bergen counties (Paterson, Prospect Park) carry small clear calcite groups in basalt with prehnite. The fluorescent reds from Franklin are the prize, and a portable SW UV lamp is essential field equipment.

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Every calcite spot we track in New Jersey

Standout calcite spots in New Jersey

Hand-picked from the full list above, with the reason each one earns a trip.

Franklin-Ogdensburg-Sterling Hill mining district
Sussex County
Sterling Hill in Ogdensburg is the twin of the Franklin deposit and the last of the district's zinc mines to close, now preserved as a mining museum.

Best counties for calcite in New Jersey

Ranked by the number of mapped calcite spots. County links open the full rockhounding page for that county.

Before you go

Read the calcite identification guide so you know what a keeper looks like in the field: Calcite in the encyclopedia.

Calcite in New Jersey FAQ

Where can you find calcite in New Jersey?+

The mapped spots concentrate in Hudson County, Passaic County, and Mercer County. Known collecting areas include Buckwheat dump (Sussex County), Sterling Hill museum (Sussex County), and Paterson quarries (Passaic County). Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.

How many calcite spots are mapped in New Jersey?+

13 spots across 7 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.

Is it legal to collect calcite in New Jersey?+

Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 11 of the 13 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find calcite

More minerals to hunt in New Jersey

Hunt calcite in New Jersey with the map in your pocket

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.