Abstract: The Qiongmo gold deposit occurs in the Cambrian silicalite and slate in the sou th subzone of western Qinling Mountains. The Se-bearing and selenium famatinite are found in quartz-barite veins in the form of dissemination or veinlets. The associated minerals include tiemannite, clasthalite， antimonselite， kullerudi te， penroseite, selenium stibnite, native gold, barite and quartz. The mineral is lead-gray in colour, brashy, with metallic luster, and 0.01～0.1mm in size. The average microhardness is 247.5kg/mm2 (for 50g load) corresponing to Moh s' hardness=4.2. The reflectance values (SiC standard) are given in 10nm steps. The representative R values are: (470nm), Rγ'=22.84～22.50, Rα'= 27.92～27 .99; (550nm), Rγ'= 22.63～22.76, Rα'=27.79～28.11; (590nm), Rγ'=22. 92～ 22.08, Rα'=28.27～28.72; (650nm), Rγ'=23.08～23.76, Rα'=28.79～29.13. E lectron microprobe analyses of eleven points on famatinite gave the results as f ollows (wt％): Sb, 24.42～28.12 (25.79 in average )； Cu, 36.60～39.94 (38.2 0 in average)；S, 14.49～25.74 (21.12 in average)；Se, 6.11～23.89 (12.76 in average ). Based on Se/(S+Se) ratios of microprobe analyses the mineral is classified as Se-bearing famatinite and selenium famatinite, corresponding to the formula (C u2.84Hg0.01)2.85(Sb1.00As0.07)1.07(S3.54 Se0.46)4.00 and (Cu3.05Hg0.03)3.08(Sb1.07A s0.03)1.10(S2.77Se1.23)4.00 respectively.