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URANINITE
and PYRITE replacing wood
Continental
Uranium Mine, Powder River Basin, Wyoming
Superb examples of Uraninite and Pyrite replacing wood! Radioactivity is
very high on both specimens.
MI-1084-A This is
nearly a quarter section of a complete log which has been sawed.
That is, it is a V shaped section of a complete log that was
probably about 6 1/2" in diameter.
The slice is 1 1/4" thick.
It has been polished on the front surface and has an epoxy coating
on the sides and back of the slice. The
Uraninite is shiny black and very dense, and the Pyrite is shiny metallic
golden color, as rich veinlets and swirls within the Uraninite. A small
amount of Chalcopyrite is also present. Beautiful!
Specimen size: 3 1/4"
from the top of the V to the base of the V, 3 3/4" wide across the
top of the V, and 1 1/4" thick
Gram weight: 642.90 grams
> 50 mR/hr @ 1”, with CD V-700
> 30,000 CPM @ 1”, with CD V-700
Price: SOLD
, less 10%
quantity discount = net price of $376.00
(A 10% quantity discount is given on all Uraninite specimens in our
inventory
that are 500 grams and larger.)
MI-1084-B
A smaller example, possibly from the same log as the specimen
described above, with very dense black Uraninite replacing wood,
associated with metallic golden color Pyrite and a very minor amount of
Chalcopyrite. This nicely
prepared specimen has the top surface polished (cut across the grain of
the wood), while the sides and base of the specimen are in natural
condition.
Specimen size: 1 7/8” X 1
1/8” across the cut surface, X 2” tall.
Gram weight: 270.00 grams
> 50 mR/hr @ 1”, with CD V-700
> 30,000 CPM @ 1”, with CD V-700
Price: SOLD
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URANINITE
replacing wood
La
Sal #2 Mine, Big Indian Wash, San Juan Co., Utah
This specimen looks like a piece of wood!
This V shaped specimen is about 1/8 of a slice of a log that was
originally approximately 5 1/2" to 6" in diameter.
The center of the log is mostly replaced by Uraninite, while the
outer portion is replaced by rock. The rock is a light brick red color --
it is from the deposit that was called "red logs" because of the
color -- it is not bright red, but you can see that it is a nice light
brick red color, in contrast to the black color of the Uraninite.
You can easily see the curved structure of the wood -- this looks
like a piece of ordinary petrified wood, yet the center is replaced by
Uraninite.
Order Item MI-1085
Specimen size: 3" thick,
2 1/4" wide at the top of the V, and nearly 3" across from the
top of the V to the base of the V.
Gram weight: 496.50 grams
5 mR/hr @ 1”, with CD V-700
3,000 CPM @ 1”, with CD V-700
Price: $173.75, less 10%
quantity discount = net price of $156.25
(A 10% quantity discount is given on all Uraninite specimens in our
inventory that are 500 grams and larger.)
SOLD
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URANINITE
, PYRITE and QUARTZ replacing wood
“C” Group, Inter-River / Green River Area, Emery
County, Utah
This interesting section of a small tree trunk or limb has had the front
of the specimen cut and polished. On the cut surface, one can see the
growth rings of the wood alternately replaced by black Uraninite, plus a
mixture of Quartz and Pyrite. A mixture of granular Quartz and Pyrite
surround the Uraninite replacement after wood on the right side of the
specimen, as oriented in the photograph. Small amounts of Chalcopyrite
and Bornite are also present. A secondary deposition of yellow-green
Schrockingerite coats portions of the perimeter of the specimen.
Schrockingerite is a hydrous fluor-carbonate-sulfate of Na, Ca, and UO,
and is fluorescent bright greenish-yellow under both SW and LW UV. From
the Dr. Eugene B. Gross collection.
Specimen weight: 68.05 grams
Specimen size: 2” X 1 1/8” across, X up to 7/8” thick
10 mR/hr @ 1” with CD V-700
7,500 CPM @ 1” with CD V-700Order Item MI-1116
Price: $40.00
SOLD
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