An exceptional museum piece of a very uncommon Hydrous Calcium Uranyl-Vanadate. Tyuyamunite. Weakly to non-fluorescent yellow under SW/UV lamps, and weakly fluorescent red under MW/UV lamps. From the big find in January 2026, this species is certain to draw the eyes of anyone checking out your collection. 

Minor Fluorite associated.  Tyuyamunite naturally loses water molecules over time, becoming the mineral Metatyuyamunite.

*Tyuyamunite is naturally emissive.  As with all naturally emissive specimens, it is not considered dangerous.  It becomes dangerous after it is processed and refined.  I still would not recommend licking or rubbing this specimen on your skin.  Do wash your hands after handling this specimen. NearEarthExploration is not responsible for acts of idiocy or ignorance by any following person or entity after purchase.

Shipping is done in accordance with US and International shipping laws, which require a 2cm air gap between the specimen and the outer packaging.  The padding we use to prevent shipping damage on every specimen we sell covers that requirement by an additional distance.

This is a naturally occurring mineral. I do not sell any man-made, repaired, glued, oiled, or otherwise 'enhanced' specimens.

Specimen comes mounted, labeled, and ready for your display.