Torbernite Specimen – Margabal Mine, France
Common Name: Torbernite – also called Cupro-Uranite
Approximate Weight: 10.1g
Locality: Margabal Mine, Entraygues-sur-Truyère, Rodez, Aveyron, Occitanie, France
Torbernite is a radioactive mineral with the formula Cu(UO₂)₂(PO₄)₂·10-12H₂O, belonging to the uraninite group typically occurring as bright green, tabular crystals or as fine-grained masses. Torbernite gets its vibrant color from both its high uranium and copper contents giving it a distinctive appearance and unique crystal structure.
Fluorescence was captured at 365nm.
Although not always fluorescent, torbernite can exhibit fluorescence due to both its uranium content and possible trace amounts of other elements or contaminants. These additional elements can contribute to the overall fluorescent properties of torbernite, resulting in variations of color and intensity in its fluorescence.
A small UV light source is included with the purchase.
Since torbernite is a very flaky mineral, this specimen was stabilized with Paraloid B-72, a commonly used conservation material in the field of mineral preservation, providing excellent protective qualities for stabilization and long-term conservation.
Shipped only with USPS Parcel Select Ground (2-8 days), wrapped in plastic, lead foil and bubble wrap in a box big enough to bring the parcel surface activity below the 0.5mR/hr shipping limit.
(the unshielded specimen itself has an activity above 70 Bq/gram)
The buyer must assume responsibility for this item and use it according to its intended purpose. Keep this away from children and store it at least five feet away from anywhere anyone spends a lot of time.
This listing meets the requirements of NRC 10 CFR 40.22
It also meets U.S.P.S domestic shipping requirements for exempt limited quantities of class 7 materials according to –347.22 “are eligible under 49 CFR to be shipped as excepted packages for limited quantities” and –Exhibit 347.22 Activity Limits– and also –173.435– Table of A1 and A2 values
This item will conform to the USPS shipping restrictions when shipped.
Geiger counter not included.
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