The Mineral stibiconite
Stibiconite is an alteration mineral of Stibnite. It forms as a dull, crusty yellow replacement mineral over Stibnite. The pseudomorph is occasionally only partial, in which only a section of the crystal has been
altered with the rest remaining intact. The name Stibiconite is derived from a combination of the Latin stibium, the old name for antimony, and konis, powder, alluding to this minerals powdery habit.
yellow, yellow-gray, gray, brownish-yellow, brown
4 - 5.5
Translucent to opaque
3.5 - 5.0
Vitreous to dull
Stibiconite is found in many of the important Stibnite localities as a pseudomorph or coating after that mineral. Two specific noteworthy deposits which produced good specimens are Xikuangshan, Lengshuijiang, Loudi Prefecture, Hunan Province, China; and Catorce, San Luis Potosí, Mexico.
Common Mineral Associations
Stibnite, Cervantite, Calcite, Barite, Valentinite