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Gunflint Iron Fm Rainbow Stromatolite (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.
$360.00 -
Gunflint Iron Fm Rainbow Stromatolite (GIS15) (Copy)
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.
$360.00 -
Gunflint Iron Fm Rainbow Stromatolite (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.
$365.00 -
Gunflint Iron Fm. Rainbow Stromatolite (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.
$285.00 -
Gunflint Iron Fm. Rainbow Stromatolite (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.
$140.00 -
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 -
Kona Dolomite (KONA10)
Notes specific to this specimen: This is an excellent sliced section showing multiple stromatolite colonies with distinct layers (laminae). The clear layering is unusual for this slightly metamorphosed material. It has a smooth back and a flat bottom so it stands up nicely.
SIZE: 6″ x 3″ x 1″
NAME: Collenia kona
AGE: Paleoproterozoic Era 2.3 billion years
UNIT: Kona Formation
SITE: Kona Hills, Michigan
DATE: 2023Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$185.00Kona Dolomite (KONA10)
$185.00 -
Kona Dolomite (KONA21)
Notes specific to this specimen: Some Kona Dolomite we have carved into various shapes to accentuate the colors and patterns. Classic pyramid shape with nice deep red iron oxide coloration. Polished all the way around – on all sides and base.
SIZE: 2.75″
NAME: Collenia kona
AGE: Paleoproterozoic Era 2.3 billion years
UNIT: Kona Formation
SITE: Kona Hills, Michigan
DATE: 2025
BY: Jon Kramer & Julie MartinezDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$112.00Kona Dolomite (KONA21)
$112.00 -
Kona Dolomite (KONA22)
Notes specific to this specimen: Some Kona Dolomite we have carved into various shapes to accentuate the colors and patterns. Classic pyramid shape with nice deep red iron oxide coloration. Polished all the way around – on all sides and base.
SIZE: 2.75″
NAME: Collenia kona
AGE: Paleoproterozoic Era 2.3 billion years
UNIT: Kona Formation
SITE: Kona Hills, Michigan
DATE: 2025
BY: Jon Kramer & Julie MartinezDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$112.00Kona Dolomite (KONA22)
$112.00 -
Kona Dolomite (KONA23)
Notes specific to this specimen: Some Kona Dolomite we have carved into various shapes to accentuate the colors and patterns. This is a traditional Zuni pueblo fetish bear shape with nice banding showing the stromatolite layering. Polished on both sides, with a flat base so it stands up easily.
SIZE: 3.5″
NAME: Collenia kona
AGE: Paleoproterozoic Era 2.3 billion years
UNIT: Kona Formation
SITE: Kona Hills, Michigan
DATE: 2025
BY: Jon Kramer & Julie MartinezDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin. In addition, an attractive and informative display card accompanies the specimen.
$85.00Kona Dolomite (KONA23)
$85.00
