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.

Collecting rules in New Hampshire

Planning a trip? See the best rockhounding spots in New Hampshire.

State symbols

State mineral: beryl (RSA 3:14, 1985). State gem: smoky quartz (RSA 3:15, 1985). State rock: granite (Visit NH).

Best regions by county

Ranked by the number of USGS-recorded sites, not by access or quality.

  1. Grafton County: 199 sites; most recorded: Beryl, Scheelite, Magnetite
  2. Rockingham County: 107 sites; most recorded: Columbite, Tantalite, Beryl
  3. Cheshire County: 83 sites; most recorded: Columbite, Tantalite, Molybdenite
  4. Sullivan County: 37 sites; most recorded: Graphite
  5. Merrimack County: 36 sites; most recorded: Granite, Uraninite

Top minerals

  • Columbite: 8 sites
  • Tantalite: 7 sites
  • Beryl: 6 sites
  • Muscovite: 3 sites
  • Granite: 3 sites
  • Magnetite: 3 sites
  • Wolframite: 2 sites
  • Graphite: 2 sites

Mineral cards

  • Feldspar

    Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat

    253 sites

  • Mica

    Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat

    241 sites

  • Copper

    Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat

    50 sites

  • Silver

    Mohs 2.5–3. Native silver tarnishes black. Mindat

    32 sites

  • Gold

    Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat

    18 sites

  • Pyrite

    Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat

    14 sites

  • Fluorite

    Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat

    11 sites

  • Garnet

    Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat

    9 sites

  • Beryl

    Mohs 7.5–8. Six-sided crystals; aquamarine and emerald are beryl. Mindat

    7 sites

  • Quartz

    Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat

    4 sites

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

Minerals most often recorded

Columbite 8Tantalite 7Beryl 6Muscovite 3Granite 3Magnetite 3Wolframite 2Graphite 2Scheelite 2Molybdenite 1Mica 1Cassiterite 1

Counties

CountySites
Grafton County199
Rockingham County107
Cheshire County83
Sullivan County37
Merrimack County36
Carroll County27
Coos County20
Hillsborough County17
Strafford County10
Belknap County (fewer than 5 sites, no page)4

Mineral guides

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