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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 -
Iron Stromatolites (ME11)
Notes specific to this specimen: Beautiful deep red agatization in these cross-cut colonies attest to the classic origin of this specimen as being from 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: 4″ x 4″ x 1/8 – 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.
$285.00Iron Stromatolites (ME11)
$285.00 -
Iron Stromatolites (ME14)
Notes specific to this specimen: Beautiful deep red agatization in these cross-cut colonies attest to the classic origin of this specimen as being from 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: 4.5″x 4.5″x 3/8″
Name: Collenia undosa
Unit: Biwabik Iron Formation
Site: Biwabik Iron Range, Minnesota
Date: Mid 1990s
By: Jon & JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$335.00Iron Stromatolites (ME14)
$335.00 -
Iron Stromatolites (ME15)
Notes specific to this specimen: Beautiful deep red agatization in these cross-cut colonies attest to the classic origin of this specimen as being from 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: 4.5″x 4.5″x 3/8″
Name: Collenia undosa
Unit: Biwabik Iron Formation
Site: Biwabik Iron Range, Minnesota
Date: Mid 1990s
By: Jon & JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$335.00Iron Stromatolites (ME15)
$335.00 -
Iron Stromatolites (ME16)
Notes specific to this specimen: Beautiful deep red agatization in these cross-cut colonies attest to the classic origin of this specimen as being from 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: 4.5″x 5″x 3/8″
Name: Collenia undosa
Unit: Biwabik Iron Formation
Site: Biwabik Iron Range, Minnesota
Date: Mid 1990s
By: Jon & JulieDocumentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
$335.00Iron Stromatolites (ME16)
$335.00 -
Iron Stromatolites (ME2)
Notes specific to this specimen: Beautiful deep red agatization in these colonies attest to the classic origin of this specimen as being from the old Mary Ellen Mine in Biwabik, Minnesota, the type locality for the Biwabik Iron Formation. The mine shut down over 50 years ago. Notice the off-set angle of the growth pattern in this piece. This is attributed to constant water currents in the area where these colonies were growing. *This specimen comes with a Certificate of Authenticity and Origin
SIZE: 4″ x 7″ x .3″
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.
$485.00Iron Stromatolites (ME2)
$485.00 -
Iron Stromatolites (ME3)
Notes specific to this specimen: Rare white colonies with dark banded growth rings. Some have branchings. Specimen found in 1990s at the old Mary Ellen Mine in Biwabik, Minnesota, the type locality for the Biwabik Iron Formation. Notice the silvery spots of concentrated iron between the colonies.
SIZE: 3″ x 5″ x .3″
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.
$365.00Iron Stromatolites (ME3)
$365.00 -
Iron Stromatolites (ME4)
Notes specific to this specimen: Rare white colonies with dark banded growth rings. Some have branchings. Specimen found in 1990s at the old Mary Ellen Mine in Biwabik, Minnesota, the type locality for the Biwabik Iron Formation. Notice the silvery spots of concentrated iron between the colonies.
SIZE: 5″ x 7″ x .3″
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.
$450.00Iron Stromatolites (ME4)
$450.00 -
Iron Stromatolites (ME5)
Notes specific to this specimen: Beautiful deep red agatization in these colonies attest to the classic origin of this specimen as being from the old Mary Ellen Mine in Biwabik, Minnesota, the type locality for the Biwabik Iron Formation. Notice the off-set angle of the growth pattern in this piece. This is attributed to constant water currents in the area where these colonies were growing.
SIZE: 4″ x 8″ x .3″
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.
$365.00Iron Stromatolites (ME5)
$365.00 -
Iron Stromatolites (MEOB2)
Notes specific to this specimen: You will receive an obelisk very similar to this one shown. We fashion only a limited number of obelisks out of this material because in the process we lose a lot of material. Even so, it is sometimes worth it as the cutting of obelisks creates a great 3-D view of the colonies. Here we have deep red agatization in these longitudinally cut colonies. These specimens attest to the classic origin of this material from 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 the material in the old discard piles that surround the pit.
Size: 2.25″ x 3″ tall
Name / Species: Collenia undosa
Age: Paleoproterozoic – 2.1 billion years
Unit: Biwabik Iron Formation
Site: Biwabik, Minnesota
Collected: 1992
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.
$155.00Iron Stromatolites (MEOB2)
$155.00 -
Iron Stromatolites (MEOB3)
Notes specific to this specimen: You will receive an obelisk very similar to this one shown. We fashion only a limited number of obelisks out of this material because in the process we lose a lot of material. Even so, it is sometimes worth it as the cutting of obelisks creates a great 3-D view of the colonies. Here we have deep red agatization in these longitudinally cut colonies. These specimens attest to the classic origin of this material from 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 the material in the old discard piles that surround the pit.
Size: 3.25″ x 4″ tall
Name / Species: Collenia undosa
Age: Paleoproterozoic – 2.1 billion years
Unit: Biwabik Iron Formation
Site: Biwabik, Minnesota
Collected: 1992
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.
$185.00Iron Stromatolites (MEOB3)
$185.00 -
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
