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Grypania Spiralis (GRY7)
Notes specific to this specimen: This piece shows clear segments of Grypania, a couple with the classic curving arc formed by this species. The most notable, however, is the clear “squiggly” segment in the top left. It is a perfect example of what’s been described as “desiccation” of the outer sheath along its length, resulting in impingement of the sheath between individual cells. It doesn’t get any more graphic than this!
SIZE: 2″ x 3″
NAME: Grypania spiralis
AGE: Paleoproterozoic Era / 2.1 billion years
UNIT: Negaunee Iron Formation
SITE: Empire Mine, Palmer, Michigan$1,800.00Grypania Spiralis (GRY7)
$1,800.00 -
Grypania Spiralis (GRY8)
Notes specific to this specimen: Nice slab showing several clear segments of Grypania, a couple with the classic full circles and others with curving arc formed by this species. A couple of the segments – like the circle in the lower middle – show examples of what’s been described as “desiccation” of the outer sheath along its length. This results in impingement of the sheath between individual cells, giving it a “bumpy” appearance. The desiccated segments are very rare.
SIZE: 1.5″ x 2″
NAME: Grypania spiralis
AGE: Paleoproterozoic Era / 2.1 billion years
UNIT: Negaunee Iron Formation
SITE: Empire Mine, Palmer, Michigan$950.00Grypania Spiralis (GRY8)
$950.00 -
Grypania Spiralis (GRY9)
Notes specific to this specimen: Nice slab showing several clear segments of Grypania, a couple with the classic full circles and others with curving arc formed by this species. A couple of the segments – like the circle in the lower middle – show examples of what’s been described as “desiccation” of the outer sheath along its length. This results in impingement of the sheath between individual cells, giving it a “bumpy” appearance. The desiccated segments are very rare.
SIZE: 3″ x 3″
NAME: Grypania spiralis
AGE: Paleoproterozoic Era / 2.1 billion years
UNIT: Negaunee Iron Formation
SITE: Empire Mine, Palmer, Michigan$2,600.00Grypania Spiralis (GRY9)
$2,600.00 -
Gunflint Chert (GIS11)
Notes specific to this specimen: This is a fantastic specimen! Multiple very clear stromatolite colonies throughout the specimen. All the more impressive because it’s from the world-famous Gunflint Iron Formation. This piece is from our original discovery in 2025. Beautiful deep red colonies with a natural black halo unlike anything we’ve ever seen. Polished with brilliant shine on front face only. Back and edges are naturally rough.
SIZE: 1.5″ x 3″
Name Collenia sp. (possible new species)
Age Anamikean / Paleoproterozoic – 1.88 billion years
Unit Gunflint Iron Formation
Site Ontario, Canada
Date 2025Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$285.00Gunflint Chert (GIS11)
$285.00 -
Gunflint Chert (GIS12)
Notes specific to this specimen: This is an unusually large stromatolite colony for this site. Also from the world-famous Gunflint Iron Formation. This piece is from our original discovery in 2025. Beautiful deep red colony with obvious laminae. Polished with brilliant shine on front face only. Back and edges are naturally rough.
SIZE: 2″ x 3″
Name Collenia sp. (possible new species)
Age Anamikean / Paleoproterozoic – 1.88 billion years
Unit Gunflint Iron Formation
Site Ontario, Canada
Date 2025Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$140.00Gunflint Chert (GIS12)
$140.00 -
Gunflint Chert (GIS15)
Notes specific to this specimen: Notes specific to this specimen: This is one of the most interesting specimens we’ve ever seen! Multiple very clear stromatolite colonies throughout the specimen and in a variety of colors with contrasting dark laminae. All the more impressive because it’s from the world-famous Gunflint Iron Formation. This piece is from our original discovery in 2025. Beautiful colonies with strawberry and deep red colonies with dark laminae bands characteristic of this site. This is unlike anything we’ve ever seen. Polished with brilliant shine on front face only. Back and edges are naturally rough.
SIZE: 3″ X 4″ X 1.5″
Name: Collenia sp. (possible new species)
Age: Anamikean / Paleoproterozoic – 1.88 billion years
Unit: Gunflint Iron Formation
Site: Ontario, Canada
Date: 2025Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$360.00Gunflint Chert (GIS15)
$360.00 -
Gunflint Chert (GIS16)
Notes specific to this specimen: These stromatolites from the Gunflint Iron are so incredibly unusual. Every one is so unique! I’ve never seen such a variety of pattern and color as we do in these. This one has purple, red, white, yellow, brown, grey, black and more! This piece is wedge-shaped, so we polished two perpendicular sides to show the longitudinal and cross cut of the colonies. Beautiful piece!
SIZE: 2″ X 2″ X 4″
Name: Collenia sp. (possible new species)
Age: Anamikean / Paleoproterozoic – 1.88 billion years
Unit: Gunflint Iron Formation
Site: Ontario, Canada
Date: 2025Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$365.00Gunflint Chert (GIS16)
$365.00 -
Gunflint Chert (GIS21)
Notes specific to this specimen: One of the most colorful pieces so far – incredible piece! Multiple very clear stromatolite colonies throughout the specimen. All the more impressive because it’s from the world-famous Gunflint Iron Formation. This piece is from our original discovery in 2025. Beautiful deep red colonies, surrounded by pink and yellow and white with natural black halos. Unlike anything we’ve ever seen. Polished with brilliant shine on front face only. Back and edges are naturally rough.
SIZE: 5″ X 2.5″ X 2.5″
Name: Collenia sp. (possible new species)
Age: Anamikean / Paleoproterozoic – 1.88 billion years
Unit: Gunflint Iron Formation
Site: Ontario, Canada
Date: 2025Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$885.00Gunflint Chert (GIS21)
$885.00 -
Gypsum, Variety Selenite (AG1)
Notes specific to this specimen: Large crystals with nearly optical clarity. Modified rhomboid shape with nice clear crystal and no inclusions. Mirror shine faces, no scratches.
Size: 7″ x 3″ X 1″
NAME: Gypsum, variety Selenite
AGE: Triassic Period, 240 million years
UNIT: Moenkopi Formation
SITE: Mohave County, Arizona
DATE: 2019Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$185.00Gypsum, Variety Selenite (AG1)
$185.00 -
Gypsum, Variety Selenite (AG3)
Notes specific to this specimen: Clean large rhomboidal crystal shape that is common in these crystals but not found in this size with this clean quality. Nice clear crystal with no inclusions. Mirror shine faces, no scratches.
Size: 6″ x 3″ X 1″
NAME: Gypsum, variety Selenite
AGE: Triassic Period, 240 million years
UNIT: Moenkopi Formation
SITE: Mohave County, Arizona
DATE: 2019Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$185.00Gypsum, Variety Selenite (AG3)
$185.00 -
Gypsum, Variety Selenite (AG7)
Notes specific to this specimen: Very complex large modified rhomboid crystal pattern with mirror-clean faces. Nice clear crystal selenite with no inclusions. The very edges of some of the crystals show some wear but this only accents the beauty of the overall piece.
Size: 6″ x 4″ X 1″
NAME: Gypsum, variety Selenite
AGE: Triassic Period, 240 million years
UNIT: Moenkopi Formation
SITE: Mohave County, Arizona
DATE: 2019Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$280.00Gypsum, Variety Selenite (AG7)
$280.00 -
Iron Stromatolites (ME10)
Notes specific to this specimen: Nice longitudinal colonies from the classic location of the old Mary Ellen Mine in Biwabik, Minnesota, the type locality for the Biwabik Iron Formation. The mine shut down over 50 years ago. We find these specimens in the old discard piles that surround the old pit. *This specimen comes with a Certificate of Authenticity and Origin
SIZE: 5.5″ x 6″ x 3/8″
Name: Collenia undosa
Unit: Biwabik Iron Formation
Site: Biwabik Iron Range, Minnesota
Date: Mid 1990sDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$320.00Iron Stromatolites (ME10)
$320.00
