This is a very small but exceptionally hot uranium ore specimen from Green River, a well-known Colorado Plateau locality for sandstone-hosted uranium deposits. Despite weighing only 0.3 ounces, this piece registers an impressive ~50,000 CPM, placing it firmly in the extreme activity category relative to size.
The specimen displays yellow to yellow-green secondary uranium mineralization, consistent with carnotite-group uranium vanadates, developed along fractures and bedding surfaces of the host rock. Activity is concentrated and immediate on a pancake probe, making this an outstanding CPM-per-gram specimen. This piece is natural and unaltered, with delicate mineral coatings that should be handled minimally.
SPECIFICATIONS
Weight: 0.3 oz (≈ 8.5 g)
Dimensions: approx. 2 × 0.75 × 0.4 inches (≈ 5.1 × 1.9 × 1.0 cm)
Locality: Green River, Utah, USA
Condition: Natural, unprocessed, no stabilization or enhancement. This piece is very fragile and should be handled very minimally.
☢️ RADIATION INFORMATION
Measured Activity: ~50,000 CPM
Instrument: Pancake Geiger probe
UV Response: None observed
Shipping: Ships legally under UN 2910 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
COLLECTOR NOTES
Location blurb: The Green River area is part of Utah’s historic Colorado Plateau uranium belt, known for visually distinctive and often high-activity secondary uranium minerals.
Non-uranium minerals: Carbon matrix, iron oxides
Activity level: Extreme relative to size
Best use case examples:
CPM density comparison specimen
Instrument response testing
Micro-display or sealed container specimen
Who this is best for:
Advanced uranium collectors
Element collectors seeking maximum activity in minimal mass
Buyers interested in high-CPM micro specimens
This is a very small but exceptionally hot uranium ore specimen from Green River, a well-known Colorado Plateau locality for sandstone-hosted uranium deposits. Despite weighing only 0.3 ounces, this piece registers an impressive ~50,000 CPM, placing it firmly in the extreme activity category relative to size.
The specimen displays yellow to yellow-green secondary uranium mineralization, consistent with carnotite-group uranium vanadates, developed along fractures and bedding surfaces of the host rock. Activity is concentrated and immediate on a pancake probe, making this an outstanding CPM-per-gram specimen. This piece is natural and unaltered, with delicate mineral coatings that should be handled minimally.
SPECIFICATIONS
Weight: 0.3 oz (≈ 8.5 g)
Dimensions: approx. 2 × 0.75 × 0.4 inches (≈ 5.1 × 1.9 × 1.0 cm)
Locality: Green River, Utah, USA
Condition: Natural, unprocessed, no stabilization or enhancement. This piece is very fragile and should be handled very minimally.
☢️ RADIATION INFORMATION
Measured Activity: ~50,000 CPM
Instrument: Pancake Geiger probe
UV Response: None observed
Shipping: Ships legally under UN 2910 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
COLLECTOR NOTES
Location blurb: The Green River area is part of Utah’s historic Colorado Plateau uranium belt, known for visually distinctive and often high-activity secondary uranium minerals.
Non-uranium minerals: Carbon matrix, iron oxides
Activity level: Extreme relative to size
Best use case examples:
CPM density comparison specimen
Instrument response testing
Micro-display or sealed container specimen
Who this is best for:
Advanced uranium collectors
Element collectors seeking maximum activity in minimal mass
Buyers interested in high-CPM micro specimens
Image 1 of 5
Image 2 of 5
Image 3 of 5
Image 4 of 5
Image 5 of 5
