sivuliite

Sivuliite is a proposed mineral species described from a small number of specimens recovered from a hydrothermal vein deposit. As of now, its status as a distinct mineral species has not been confirmed by the International Mineralogical Association (IMA). The original publication provided provisional chemical and crystallographic data, but independent verification and additional samples have not been reported, so the mineral's composition, crystal structure, and even its existence remain unconfirmed.

The available information indicates it was associated with gangue minerals such as fluorite and quartz within altered host rocks. No established standards for properties such as hardness, color, luster, or optical characteristics exist due to the limited material and lack of verification.

If confirmed, sivuliite would be incorporated into the mineralogical taxonomy and would require a defined chemical formula, crystal system, and type locality, along with deposition environment interpretation. Until then, sivuliite is treated as a provisional name in mineral literature.