EXV67XXX: The finding of Fluellite in Dachang, produced at the beginning of 2025, constitutes an unexpected mineralogical event in a district traditionally known for its stibnite mineralizations, as well as an absolute novelty, since until now its presence had not been recorded. Its appearance therefore represents a relevant advance in the knowledge of this rare species.
In this specimen the Fluellite appears crystallized, something uncommon in this species. It shows a delicate uniform lemon-yellow color and is on a matrix formed by white and translucent Quartz crystals. It is a specimen of great quality for the species, both for its color and for the considerable size of its crystal groups.
The specimen has been published in the magazine ‘Paragénesis’, number 02/2025, page 133.

Geologically, the area consists of thick Paleozoic limestone and dolomite sequences affected by strong faulting and fracturing, which provided pathways for hydrothermal fluids rich in sulfides, antimony, and volatile elements. These processes produced mineralized pockets and fissures where Carlhintzeite developed together with other little-common species such as Gearksutite, Carnotite or this Fluellite, for example.
Dachang mining area, Qinglong, Qianxi'nan Autonomous Prefecture, Guizhou Province  China (03/2025)

Specimen size: 4.4 × 3.7 × 2.5 cm cm = 1.73”