These are single uranium-bearing rock samples measuring 30,000 to 35,000 CPM, making them solid medium-activity specimens suitable for new collectors, educators, or anyone seeking an affordable radioactive source. Activity is measured using a Ludlum Model 3 with a 44-9 pancake probe, ensuring consistent and realistic CPM readings.
Each sample is a natural, unprocessed piece, often cut or broken from larger uranium-bearing material. Mineralization commonly includes secondary uranium minerals such as carnotite, with occasional uraninite-bearing zones present depending on the individual piece. Samples are randomly selected, and photographs represent the general type and quality you can expect—not the exact specimen received.
Weight: Varies (single rock sample)
Dimensions: Varies
Locality: United States (Colorado Plateau region)
Condition: Natural, unprocessed, no stabilization or enhancement
Measured Activity: ~30,000–35,000 CPM
Instrument: Ludlum Model 3 with 44-9 pancake probe
UV Response: None observed
Shipping: Ships legally under UN 2911 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
Geologic context: Sandstone-hosted uranium deposits of the Colorado Plateau are well known for secondary uranium minerals formed through groundwater transport and oxidation.
Non-uranium minerals: Sandstone matrix, iron oxides (goethite/limonite)
Activity level: Moderate–Strong relative to size
Best use cases:
Beginner uranium collections
Educational demonstrations
Affordable radiation source
Best for:
First-time uranium collectors
Educators and demonstrators
Buyers wanting a step up from 10–15k CPM material
These are single uranium-bearing rock samples measuring 30,000 to 35,000 CPM, making them solid medium-activity specimens suitable for new collectors, educators, or anyone seeking an affordable radioactive source. Activity is measured using a Ludlum Model 3 with a 44-9 pancake probe, ensuring consistent and realistic CPM readings.
Each sample is a natural, unprocessed piece, often cut or broken from larger uranium-bearing material. Mineralization commonly includes secondary uranium minerals such as carnotite, with occasional uraninite-bearing zones present depending on the individual piece. Samples are randomly selected, and photographs represent the general type and quality you can expect—not the exact specimen received.
Weight: Varies (single rock sample)
Dimensions: Varies
Locality: United States (Colorado Plateau region)
Condition: Natural, unprocessed, no stabilization or enhancement
Measured Activity: ~30,000–35,000 CPM
Instrument: Ludlum Model 3 with 44-9 pancake probe
UV Response: None observed
Shipping: Ships legally under UN 2911 – Excepted Radioactive Material
⚠️ Radiation Notice:
This specimen emits measurable ionizing radiation. Avoid prolonged handling and display appropriately.
Geologic context: Sandstone-hosted uranium deposits of the Colorado Plateau are well known for secondary uranium minerals formed through groundwater transport and oxidation.
Non-uranium minerals: Sandstone matrix, iron oxides (goethite/limonite)
Activity level: Moderate–Strong relative to size
Best use cases:
Beginner uranium collections
Educational demonstrations
Affordable radiation source
Best for:
First-time uranium collectors
Educators and demonstrators
Buyers wanting a step up from 10–15k CPM material
