Delaware County Sunstone (Aventurine Feldspar)
Approximate — check official site before visiting
Rare metamorphic sunstone (aventurine oligoclase feldspar) found in Delaware County. Produces an orange-gold schiller effect from oriented hematite platelets. Found in stream gravels of Crum Creek and Ridley Creek drainages, and in construction excavation spoil piles. Permission required from landowners.
🌐 Visit Official Site →🪨 What You Can Find Here
Sunstone
Oregon's state gem. A feldspar with brilliant copper inclusions that flash when light hits them.
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:
📍 Nearby Locations in Pennsylvania
Pennsylvania Quartz & Amethyst
Delta, Pennsylvania · Fee Dig
Fee-dig operations in York County for quartz crystals and amethyst. The Peach Bottom area produces fine crystal specimens.
Pennsylvania Trilobite Beds
Annville, Pennsylvania · Public Land
Road cuts in central Pennsylvania for Devonian trilobites (Phacops, the state fossil), brachiopods, and corals.
Pennsylvania Pyrite Beds
Lancaster, Pennsylvania · Public Land
Lancaster County exposures for pyrite (fool's gold) cubes and quartz crystals. Classic Pennsylvania mineral collecting.
Pennsylvania Anthracite Mine Dumps
Pottsville, Pennsylvania · Public Land
Coal mine dumps in the anthracite region for Carboniferous plant fossils (lepidodendron, sigillaria, ferns).
Cornwall Iron Mine Dumps
Cornwall, Pennsylvania · Public Land
Historic iron mine dumps for garnet, pyrite, and magnetite specimens. Cornwall was one of the most productive iron mines in the US.
Pennsylvania Crystal Mine (Blue Ball)
Blue Ball, Pennsylvania · Fee Dig
Fee-dig operation in Lancaster County for quartz crystals and amethyst. Good family-friendly rockhounding.
⛏️ Recommended Gear
Make the most of your visit to Delaware County Sunstone (Aventurine Feldspar) 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