TXX93XXX: The finding of carlhintzeites in Dachang, produced at the beginning of 2025, constitutes an unexpected mineralogical event in a district traditionally known for its stibnite mineralization. Until then, Carlhintzeite had only been documented in the form of very small crystal aggregates or poorly differentiated masses, without defined macroscopic specimens. The appearance of crystals of good size therefore represents a relevant advance in the knowledge of this very rare species.

In this specimen, the intensely yellow Carlhintzeite appears associated with nearly colorless Creedite, on a rock matrix with Quartz. This association is consistent with the presence of late hydrothermal fluids enriched in fluorite and sulfates, typical of the post-stibnite stages of the district. The coexistence of both species suggests a final hydrothermal pulse particularly rich in volatiles, capable of generating cavities where uncommon minerals developed.

For a more detailed description of the mineralogical context and the circumstances of the find, this FMF article can be consulted: Carlhintzeite from Dachang
Dachang mining area, Qinglong, Qianxi'nan Autonomous Prefecture, Guizhou Province  China (03/2025)

Specimen size: 6.7 × 4.1 × 1.6 cm = 2.64” × 1.61” × 0.63”

Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”