$2,500Median
1Sold (12 mo)
$2,500Last sale
Siegenite specimens for sale
10 for sale · $250–$4,700 USD
10 in the gallery
Siegenite is a nickel–cobalt sulfide with an isometric crystal system and a metallic luster. It presents as opaque grains or masses with colors ranging from gray to red or violet, often forming granular to massive aggregates and exhibiting a gray to black streak. Typical hardness on the Mohs scale is 5 to 5.5, and its specific gravity lies around 4.5 to 4.8, making it a fairly dense specimen for its size.
- Formula
- (Ni,Co)3S4
- Rarity
- Uncommon
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Sulfides - Including Selenides and Tellurides
Key characteristics
- Crystal system
- isometric
- Mohs hardness
- 5–5.5
- Specific gravity
- 4.5–4.8
- Luster
- metallic
- Transparency
- opaque
- Color
- gray, red, violet
- Streak
- gray, black
- Cleavage
- none
- Fracture
- uneven
- Crystal habit
- granular, massive
Buy Siegenite specimens
View all 10Where Siegenite is found
Top localities
- Buick Mine7 specimens
- Sweetwater Mine4 specimens
About Siegenite
Notable specimens come from classic sulfide localities, with historical and ongoing finds reported from regions in the United States and Germany. Specimens may display a range of surface luster from dull to shiny metallic, and the mineral’s habit in collective samples can emphasize its granular or massive forms rather than well-defined crystals. Collectors value Siegenite for its metallic appearance and the contrast of color within a single mineral, as well as its place within sulfide chemistry alongside related nickel- and cobalt-rich phases.
