TR97AF7: Chalcopyrite crystals with tetrahedral morphology superficially substituted for and recrystallized by Sphalerite. The Chalcopyrite-Sphalerite crystals are implanted on a transparent Quartz crystal.
This sample has been referenced and figured as a novelty in Ste. Marie 2017, in the magazine "Le Règne Minéral" (Num. 136. 2017; page 43)

Qagan Obo deposit (Rongguan), Diyanqinamu mining district, East Ujimqin Banner (Dongwu Qi), Xilin Gol League (Xilinguole Prefecture), Inner Mongolia Autonomous Region  China (05/2016)

Specimen size: 20.3 × 7.7 × 4.3 cm = 7.99” × 3.03” × 1.69”

Main crystal size: 1.4 × 1.4 cm = 0.55” × 0.55”