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Gem Trails of Michigan and Wisconsin: A Rockhound's Field Guide to the Best Collecting Sites, GPS Coordinates, and What to Find - Lake Superior Agates
Paperback
Series: Gem Trails: The Rockhound's Field Guide, Book 1
Publisher: Independently Published
Published: Aug 25 2026
Pages: 90
Weight: 0.29
Height: 0.19 Width: 6.00 Depth: 9.00
Language: English
easily. But if you know which beaches to
walk, which storms to follow, and what wet
gravel looks like when it's hiding something
extraordinary - the finds come.
Michigan's Upper Peninsula sits on
1.1-billion-year-old basalt that produced
and some of the finest mineral specimens
ever found on the continent. Wisconsin's
Driftless Area exposes lead-zinc mineral
districts that fueled America's first mining
boom. Both states have Lake Superior agate
beaches, glacial gold, and collecting sites
that most field guides never mention.
Gem Trails of Michigan and
Wisconsin is the WHERE guide.
GPS coordinates, land access status,
seasonal collecting tips, and exactly
what to look for at 20 verified sites
across both states - updated to 2026.
Michigan Upper Peninsula.
Agate Beach at Grand Marais - one of the
finest Lake Superior agate beaches in
Michigan. Keweenaw Peninsula copper country
- Delaware Mine, Copper Harbor beaches,
McLain State Park. Petoskey stone beaches
at Petoskey State Park and Fisherman's
Island State Park - 6 miles of undeveloped
Lake Michigan shoreline. Yooperlite hunting
at night with a 365nm UV flashlight.
Michigan Lower Peninsula.
Alpena area Rockport Quarry for Devonian
fossils. Southwest Michigan Lake Michigan
beaches for lightning stones and glacial
agates. Lower Peninsula gravel pits for
transported copper float and Lake Superior
agates.
Wisconsin Lake Superior Coast.
Wisconsin Point in Superior and Chequamegon
Bay Highway 13 beaches - the best Lake
Superior agate collecting in Wisconsin.
Chequamegon-Nicolet National Forest for
garnet, kyanite, and glacial mineral float.
Gogebic Range mine dumps - the longest
mineral specimen list of any Wisconsin site.
Wisconsin Driftless Area.
Hazel Green and Platteville lead district
mine dumps - galena crystals, sphalerite,
smithsonite. Mineral Point Iowa County
dolomite vugs with quartz crystals and
barite. Crawford County Driftless Area
fossil sites. Devil's Lake Baraboo
Quartzite. Estabrook Park Milwaukee -
Wisconsin's only documented diamond
locality.
Field Reference.
How to identify Lake Superior agates
in mixed beach gravel. How to hunt
yooperlites at night. How to identify
galena and the lead district minerals.
How to find Petoskey stones in wet gravel.
Reading public land boundaries in the
field.
Complete Appendix.
GPS master list for all 20 sites.
Collecting regulations by land type.
Recommended gear including 365nm UV
flashlight guidance. 10 local clubs
and contacts. 25-term geological glossary.
Pair this with a Michigan and Wisconsin
rock identification guide and you have the
complete system - one book that shows you
what the specimens look like, this one
that tells you exactly where to find them.
20 verified sites. Every GPS coordinate
you need. Yooperlites, agates, copper,
and galena - all in one field guide.
Bring your UV light.Scroll up and get your copy today.
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