Where to Find Amber in New Jersey

New Jersey amber comes from the Raritan Formation, a Cretaceous coastal plain unit exposed in clay pits along the lower Raritan River. The Sayreville and South Amboy pits in Middlesex County are the type localities, with amber pieces ranging from millimeter chips to baseball-sized blocks. The amber is often dark and resin-rich, and insect inclusions (gnats, beetles, plant material) are among the oldest preserved arthropods in North America. Cliffwood Beach in Monmouth County yields tide-tumbled amber after storms. Most pit ground is privately owned and access depends on club arrangements or museum partnerships; beach collecting at Cliffwood is open with normal storm-window timing. The most productive ground is in Sayreville pits (Middlesex County), South Amboy clay pits (Middlesex County), Cliffwood Beach (Monmouth County).

Casual hand collection of common rocks and minerals like amber is allowed on most BLM and U.S. Forest Service land in New Jersey, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always confirm rules before a trip.

Sayreville pits (Middlesex County) is the standout. Other strong ground includes South Amboy clay pits (Middlesex County), Cliffwood Beach (Monmouth County).

Beach amber turns up most reliably after winter and early-spring nor'easters strip the surface sand from Cliffwood. Summer beach combing rarely produces.