Soddyite
2 in the gallery
Soddyite is a uranium silicate mineral that typically forms as yellow to brown crystals or crusts, often displaying a vitreous to resinous luster. It commonly occurs as small, well-formed crystals or encrustations on matrix, highlighting a soft, translucent to opaque appearance with a characteristic pale to deep yellow hue. The mineral crystallizes in the monoclinic system and is associated with secondary uranium mineral assemblages, where weathering fluids promote its formation near oxidized uranium deposits.
- Formula
U(SiO₄) · 2H₂O
Where Soddyite is found
Top localities
- Musonoi Mine1 specimen
- Shinkolobwe1 specimen
About Soddyite
Notable specimens have been reported from Congo, where uranium-rich environments and stable, dry storage conditions favor preservation of delicate forms. Collectors value soddyite for its brightness, microcrystal faces, and the way it refracts light across the yellow spectrum. Although radioactive, when handled with care, it provides a striking, color-rich addition to mineral cabinets and display cases, especially for those focusing on secondary uranium minerals and oxidized ore deposits.