Maple Grove Quarry
Approximate — check official site before visiting
Historic limestone quarry in northwestern Seneca County near Tiffin. Offers access to Paleozoic-era fossils and mineral specimens. Collect feldspar crystals and calcite specimens from glacial deposits. Permission required from quarry operator. Flat terrain. Hazards: sharp rock, loose/unstable rock, abandoned mine shafts.
🌐 Visit Official Site →🪨 What You Can Find Here
Feldspar
Common rock-forming mineral group. Found in granites and pegmatites throughout the US, often associated with gem minerals.
Also found at:
Quartz Crystals
Clear, smoky, and rose quartz crystals are among the most common and rewarding rockhounding finds. Arkansas produces world-class quartz.
Also found at:
Calcite
Common but versatile carbonate mineral that forms in many crystal habits. Found in geodes, cave deposits, and veins throughout the US.
Also found at:
Fossils
From shark teeth in Florida to dinosaurs in Montana, the US offers world-class fossil hunting for all skill levels.
Also found at:
📍 Nearby Locations in Ohio
Ohio Flint Ridge
Brownsville, Ohio · State Park
Flint Ridge State Memorial — Ohio flint is legendary among knappers. Beautiful rainbow-colored flint in many varieties. Surface collecting permitted.
Ohio Trilobite Exposures
Sylvania, Ohio · Public Land
Road cuts and exposures in northwest Ohio for Devonian trilobites, brachiopods, and other Paleozoic fossils.
Ohio Geode Beds
Tiffin, Ohio · Public Land
North-central Ohio creek beds and exposures for geodes and calcite crystals. Part of the Findlay Arch mineral district.
Vanport Flint Quarries
Zaleski, Ohio · Public Land
Ancient quarry sites in Vinton County used by Native Americans for high-quality Vanport flint. Part of the Ohio Flint Ridge region. Excellent for knap...
Ohio Caverns Gem Mining
West Liberty, Ohio · Fee Dig
Year-round gem mining at Ohio Caverns. Purchase bags of mining rough seeded with gemstones, emeralds, minerals, fossils, or arrowheads. Use outdoor sl...
Seneca Caverns Gem Mining
Bellevue, Ohio · Fee Dig
Gem mining at Seneca Caverns in Bellevue, OH. Seneca Mining Company offers sluice mining for gems, minerals, and fossils. Seasonal hours: May (Sat-Sun...
⛏️ Recommended Gear
Make the most of your visit to Maple Grove Quarry with the right equipment.
Rock Hammer
The most essential rockhounding tool. Choose a hammer with both a flat striking face and a pointed pick end.
Typical: $25-45
Safety Glasses
Mandatory protective gear. Rock chips fly unpredictably when hammering.
Typical: $10-20
Chisel Set
Cold chisels in 3-4 sizes for precise extraction from matrix rock.
Typical: $15-30
Geologist's Pick
A heavier crack hammer for splitting hard rock. Essential for hard rock mining areas.
Typical: $35-60
Sifting Screen
Stackable mesh screens for sifting gravel and dirt. Essential for gem and fossil hunting.
Typical: $20-40
UV Flashlight
Long-wave UV light for finding fluorescent minerals and Yooperlites.
Typical: $15-35