The two naturally occurring radioactive ores are Uranium ore and Thorium ore. Other radioactive elements (for example Radium) are found as small impurities in Uranium and Thorium ores. Generally speaking, Uranium ores are more radioactive than Thorium ores. An interesting fact is that 98% of the radiation emitted from some Uranium ores is actually coming from the tiny (less than 1%) Radium impurity in the ore, not from the Uranium not as you would expect.
This is why Uranium ore is much more radioactive than pure Uranium metal.
In this section you will find our radioactive ores, if you are interested in pure Uranium metal, please see our Chemicals & Metals section. The availability of our radioactive ores varies with the season. In the Winter months very little ore is available as the mines are frozen and not accessible by our prospectors. Spring & Summer months we tend to have a much larger variety of ores and you will see many more products listed here than other times of the year.
How Ore is Measured
The radiation measurements stated on all of our radioactive items is guaranteed to be accurate. All samples are measured with a modern, calibrated Geiger Counter as well as a calibrated Stabilized Assay Meter. We measure the total Beta and Gamma radiation emissions from each sample in CPM (Counts Per Minute) using a standard 'Hot Dog' probe (such as a Ludlum 44-6). Geiger Counter measurements taken with Pancake or End Window probes will produce falsely high readings and are deceptive to the customer. The same is true if readings are taken with a Scintillator or Scintillation probe. The radiation emission number stated with each sample is the combined Beta and Gamma emissions, taken from the area on the sample that produces the highest reading. We do not measure or include the Alpha radiation emissions as that too produces falsely high readings.