RockWoof
Check access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.

Sketch map

Special Aggregates Corp. (Occurrence)Unnamed Magnetite Occurrence (Occurrence)Little Falls Deposit (Occurrence)Salisbury Mine (Past Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
4 paw pins, one per site. Hover or tap a pin for the site name. 1 site(s) with USGS coordinates outside the outline are not pinned. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Woof’s favorite find

Special Aggregates Corp.

We picked it because its USGS record mentions 1 gem or collectible mineral (Garnet) and 1 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Garnet. Minerals mentioned: Garnet. Approx. location 43.293, -74.945. USGS record.

Ask first: a USGS record doesn’t mean you can visit. Find out who owns the land and get permission before collecting.

Field cards: what kind of sites?

3
Occurrence

The mineral was noted here, without development.

1
Past Producer

Produced ore or material at some point in the past.

1
Producer

Was producing when the record was made.

Status terms come from USGS MRDS records.

Mineral cards

Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.

Minerals recorded here

No individual minerals are listed in these records.

Commodities

Iron 3Semiprecious Gemstone 1Garnet 1

Sites

SiteCommodityMinerals recordedStatusApprox. location
Salisbury MineIron—Past Producer43.170, -74.793
Unnamed Magnetite OccurrenceIron—Occurrence43.292, -74.901
Ace of Diamonds MineSemiprecious Gemstone—Producer43.100, -75.233
Special Aggregates Corp.Garnet—Occurrence43.293, -74.945
Little Falls DepositIron—Occurrence43.025, -74.860

Fossil collections

The Paleobiology Database lists 33 fossil collection records in Herkimer County. These are research records, not public dig sites.

Nearby counties

Oneida County · Montgomery County · Fulton County · Madison County · Schoharie County

New York mineral guides

Back to all New York counties.

Related articles

How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.

Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.

Updated