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Trilobite Tracks (TRX01)
Notes specific to this specimen: HOW THEY FORMED – This is the largest slab with trilobite tracks and traces ever to be found at this famous site and possibly the largest single specimen of trilobite tracks in the world. These trace fossils formed during the Mississippian Period, roughly 325 million years ago, when trilobites crawled across the soft sediment of an ancient marine seafloor. As they moved, their numerous legs scratched the soft sediment creating paired trails known as Cruziana. Look closely at the ripple patterns: You will see several places where a trilobite was crawling over a ripple crest, making clear tracks, but it then “floated” across a depression, leaving no trail at all. When it reconnected with a ripple crest on the other side, it once-again left a trail. Where a trilobite paused or burrowed shallowly into the sediment, it could leave a broader, bilobed impression called Rusophycus.
Fine sediment subsequently covered these traces, protecting them from currents and erosion. Burial and compaction gradually hardened the sediment into rock, preserving the impressions as natural casts or molds. Much later, uplift, erosion and quarrying exposed the bedding surface, revealing the intricate record of trilobite activity.
Size: 30″ x 40″ X 1.5″
Name / Species: Cruziana and Rusophycus
Age: Mississippian Period, 325 million years
Unit: Tar Springs Formation
Site: Perry County, Indiana
Collected: 1992
Collected by:Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
NOTE: Pickup is available for this specimen. If shipping is required, you will be charged for crating the specimen.
$9,600.00Trilobite Tracks (TRX01)
$9,600.00 -
Agatized Coral Pack (ACPAK1)
Notes specific to this specimen: Lot of 1.5 pounds multiple sizes of tumble-polished agatized coral pieces.
SIZE: 1.5 Pounds
Name / Species: Several species
Age: Oligocene Epoch- 34 million years
Unit: Suwanee Limestone
Site: Lowndes County, Georgia
Collected: 2025
Collected by: Jon and JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$45.00Agatized Coral Pack (ACPAK1)
$45.00 -
North American Rift Pack (RIFTPAK1)
Notes specific to this specimen: Total of three pounds of tumbled North American Rift pieces. Approximately 20 pieces with excellent infilled fractures. Three with crystals will be included and wrapped separately. These are loose pieces that we picked up at the site and put in the tumbler. They have a nice smooth honed finish, not a glossy polish.
SIZE: 3 Pounds
Name / Species: White Quartz, Citrine, Fluorite
Age: Mesoproterozoic Era – 1.1 billion years
Unit: Rove Formation
Site: Cerdito Prospect, Thunder Bay, Ontario, Canada
Collected: 2025
Collected by: Jon and JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$65.00 -
Sudbury Impactite (SUD22)
Notes specific to this specimen: Cut wedge-shape slab with nice splashes of both copper and nickel crystallizations in this piece. Front gloss polished, back sawn. This piece stands upright on a flat sawn bottom with the front angled slightly upward to highlight the face.
SIZE: 2.5″ X 3″
Name / Species: Sudbury Impactite
Age: Paleoproterozoic Era – 1.85 billion years
Unit: Sudbury Impact Complex
Site: Sudbury, Ontario, Canada
Collected: 2025
Collected by: Jon and JulieDocumentation: This specimen comes with a Certificate of Authenticity and Origin. In addition, an informative display card accompanies the specimen.
$165.00Sudbury Impactite (SUD22)
$165.00 -
Sudbury Impactite (SUD21)
Notes specific to this specimen: Cut wedge-shape slab with nice splashes of both copper and nickel crystallizations in this piece. Front gloss polished, back sawn. This piece stands upright on a flat sawn bottom with the front angled slightly upward to highlight the face.
SIZE: 2.5″ X 3″
Name / Species: Sudbury Impactite
Age: Paleoproterozoic Era – 1.85 billion years
Unit: Sudbury Impact Complex
Site: Sudbury, Ontario, Canada
Collected: 2025
Collected by: Jon and JulieDocumentation: This specimen comes with a Certificate of Authenticity and Origin. In addition, an informative display card accompanies the specimen.
$165.00Sudbury Impactite (SUD21)
$165.00 -
North American Rift (RIFT104)
Notes specific to this specimen: Several very fine healed fractures. Beautiful white quartz and citrine infilling in the fractures of jet-black Rove Formation. Cut front face has a nice smooth satin finish. This specimen is a “stand-up” with a cut flat bottom, allowing it to sit upright to show off the display face. Back is a cut face also showing nice bifurcations. Edges are naturally rough.
SIZE: 2.5″x 2.5″x 1″
Name / Species: White Quartz, Citrine
Age: Mesoproterozoic Era – 1.1 billion years
Unit: Rove Formation
Site: Cerdito Prospect, Thunder Bay, Ontario, Canada
Collected: 2025
Collected by: Jon and JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$65.00 -
North American Rift (RIFT103)
Notes specific to this specimen: Cut wedge-shape has great jagged healed fractures! Beautiful white quartz and citrine infilling the fractures of jet-black Rove Formation. Cut front face has a nice smooth satin finish. This specimen is a “stand-up” with a cut flat bottom, allowing it to sit upright to show off the display face. Back is naturally rough.
SIZE: 2.5″x 2.5″x 2″
Name / Species: White Quartz, Citrine
Age: Mesoproterozoic Era – 1.1 billion years
Unit: Rove Formation
Site: Cerdito Prospect, Thunder Bay, Ontario, Canada
Collected: 2025
Collected by: Jon and JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$65.00 -
North American Rift (RIFT102)
Notes specific to this specimen: Several very fine healed fractures. Beautiful white quartz and citrine infilling in the fractures of jet-black Rove Formation. Cut front face has a nice smooth satin finish. This specimen is a “stand-up” with a cut flat bottom, allowing it to sit upright to show off the display face. Back is a cut face also showing nice bifurcations. Edges are naturally rough.
SIZE: 2.5″x 2.5″x 1″
Name / Species: White Quartz, Citrine
Age: Mesoproterozoic Era – 1.1 billion years
Unit: Rove Formation
Site: Cerdito Prospect, Thunder Bay, Ontario, Canada
Collected: 2025
Collected by: Jon and JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$65.00 -
Microbially Induced Sedimentary Structure (MISS01)
Notes specific to this specimen: Incredible specimen! This strange and unique material was discovered years ago when our associate Glen Rockers was visiting a small quarry in Oklahoma. He excavated half a dozen slabs before the quarry worked through the area and the layer was destroyed. Most of the specimens were donated to museums, including one we gave to the Smithsonian in 2024 and another to the Florida Museum of Natural History in 2025.
HOW THEY FORMED
This MISS structure formed when microbial mats, composed primarily of bacteria and algae, colonized the sandy sediments of a coastal environment approximately 305 million years ago. The microbes secreted sticky extracellular substances that bound sand grains together, stabilizing the sediment surface against currents and waves. As sediment accumulated, microbial growth, mat shrinkage, and interactions with moving water produced the complex ridges, wrinkles, and convoluted wavy patterns preserved in the rock. Burial beneath subsequent layers of sediment protected the structures from erosion. Over time, compaction and cementation transformed the sand into Hartshorne Sandstone, preserving this fossilized record of microbial activity in an ancient environment.SIZE: 28″ x 40″ x 1.5″
SHIPPING: If you cannot pick up the specimen in person, additional crating and shipping charges will apply. Please contact us for details.
Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$6,800.00 -
Thunder Bay Amethyst (TBA21)
Notes specific to this specimen: Deep purple crystals all over the front and top of this specimen. Nice collection of complex cavities intersecting in this piece. This is a “stand-up” with a cut flat bottom allowing it to sit upright to show off the crystal cavity nicely. Rock is naturally rough all the way around.
SIZE: 4″x 3″x 2″
Name / Species: Quartz, variety Amethyst
Age: Mesoproterozoic Era – 1.1 billion years
Unit: Archean Granite (unassigned formation)
Site: Diamond Willow Mine, Pearl, Ontario, Canada
Collected: 2016
Collected by: Jon and JulieDocumentation: This authentic specimen comes with a Certificate of Authenticity and Origin.
$95.00Thunder Bay Amethyst (TBA21)
$95.00 -
Minnesota Thomsonite (MNT13)
Notes specific to this specimen: Cut and polished matrix piece from the old Thomsonite Mine along the North SHore of Lake Superior about five miles southwest of Grand Marais, Minnesota. Front polished face has multiple Thomsonites. Back and sides are rough.
Size: 3″ x 3″ x 2.5″
Name / Species: Thomsonite
Age: Mesoproterozoic Era, 1.1 billion years
Unit: Terrace Point Basalt
Site: Alley Agate Shop Thomsonite Mine Cook County, Grand Marais, MInnesota
Collected: 1981
Collected by: Jon KramerDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$65.00Minnesota Thomsonite (MNT13)
$65.00 -
Minnesota Thomsonite (MNT12)
Notes specific to this specimen: Cut and polished matrix piece from the old Thomsonite Mine along the North SHore of Lake Superior about five miles southwest of Grand Marais, Minnesota. Almost all the six polished surfaces have multiple Thomsonites.
Size: 2.5″ x 2″ x 1.5″
Name / Species: Thomsonite
Age: Mesoproterozoic Era, 1.1 billion years
Unit: Terrace Point Basalt
Site: Alley Agate Shop Thomsonite Mine Cook County, Grand Marais, MInnesota
Collected: 1981
Collected by: Jon KramerDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$85.00Minnesota Thomsonite (MNT12)
$85.00
