Stibnite
Stibnite is a sulfide mineral known for its striking metallic crystals, with several world-class Chinese localities.
About Stibnite
Stibnite is classified as a sulfide mineral in the stibnite group and has the chemical formula Sb2S3. It crystallizes in the orthorhombic system and is relatively soft, requiring careful handling. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.
Identification & care
Crystals commonly develop as prismatic striated crystals, acicular clusters, massive; bent and curved crystals common. Its color is typically lead-grey with iridescent tarnish and sometimes golden-yellow coating. The luster is metallic, the streak is lead-grey, and specimens are typically opaque. The cleavage is perfect on {010}. The fracture is uneven, sub-conchoidal, which aids identification.
Collector context
How it forms
Stibnite forms in low- to medium-temperature hydrothermal veins; often associated with gold and quartz; also in hot-spring deposits. It is commonly found in association with realgar, orpiment, arsenopyrite, cinnabar, quartz, pyrite, gold, calcite, barite.
Classic Chinese localities
**Xikuangshan Sb deposit (Xikuangshan antimony deposit)** is a benchmark source for stibnite.
Why collectors care
Collectors gravitate to Stibnite for the drama of its metallic luster and the geometry of its crystals — long striated blades, parallel sprays, or radiating clusters depending on the specimen. A large terminated group of stibnite with intact luster is a centerpiece-level display object, and Chinese localities (where relevant) have produced some of the world's best-preserved material.
What affects value
Value in Stibnite is assessed, in typical order of weight, against: (1) locality provenance; (2) crystal size; (3) termination quality and crystal completeness; (4) metallic luster integrity (absence of tarnish); (5) crystal habit elegance (parallel, radiating, or bladed); (6) matrix contrast and aesthetic balance; (7) condition and absence of re-attached crystals. Verified locality documentation and absence of cleaning residue act as strong multipliers across the above.
Naming history
The name Stibnite has a specific etymological and historical context — see Mindat's reference entry for provenance details. We have retained naming data at the record level; published prose is paraphrased from factual fields rather than copied from source.
Available Stibnite specimens
Stibnite Crystal on Matrix, Hunan, China
Stibnite Crystal Cluster, Hunan, China
Stibnite Cluster with Barite, Lengshuijiang, Hunan
Stibnite Crystal with Calcite, Hunan
Stibnite Blade Cluster, Hunan
Stibnite Crystal – High-Luster Blades, Hunan, China
Stibnite and Barite Cluster – Hunan, China
Stibnite Crystal Cluster – Hunan, China
Stibnite Needle Crystal Formation – Hunan, China
Twin Stibnite Crystal – Blade Formation – Hunan, China
Stibnite Crystals – Metallic Brilliance – Lengshuijiang, Hunan
Stibnite Crystal Formation – Antimony Sulfide – Hunan, China
Acicular Stibnite Cluster – Metallic Brilliance – Hunan, China
Stibnite Crystal on Barite – Hunan, China
Stibnite Crystal – Iridescent Metallic – Hunan, China
Stibnite Crystal – Columnar Form – Hunan, China
Stibnite Crystals – Acicular Radiating Form – Lengshuijiang, Hunan
Stibnite Crystal – Columnar Form – Lengshuijiang Mine, Hunan
Stibnite Crystal – Prismatic Form – Lengshuijiang Mine, Hunan
Stibnite Crystals, Lengshuijiang, China
Stibnite Crystals, Hunan, China
Stibnite Crystal Formation, Hunan, China
