Guide
Siderite specimens for sale
268 for sale · $60–$15,000 USD
857 in the gallery
Siderite is an iron carbonate mineral that forms in sedimentary and hydrothermal environments. It typically appears as brown to yellow-brown crystals, often in rhombohedral or tabular habits, with a resinous to vitreous luster. Transparent to translucent specimens can be sought by collectors, and its subtle color variations and crystal forms reward careful study under magnification.
- Formula
- FeCO3
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Carbonates; Strunz 5.CO3
Key characteristics
- Crystal system
- trigonal
- Mohs hardness
- 3.5–4.5
- Specific gravity
- 3.83–3.96
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent
- Color
- white, gray, brown, red, yellow, green
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven, subconchoidal
- Crystal habit
- rhombohedral, scalenohedral, prismatic, botryoidal, granular, massive
- Gem mineral
- Classic / historic
Buy Siderite specimens
View all 268Where Siderite is found
Top localities
- Panasqueira Mines132 specimens
- Rapid Creek35 specimens
- Turt Mine31 specimens
- Neudorf27 specimens
- Eagle Mine26 specimens
- Herja Mine21 specimens
- Morro Velho mine19 specimens
- Neudorf19 specimens
- Boltsburn Mine11 specimens
- Poudrette Quarry11 specimens
Guides
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Guide
Siderite from Panasqueira Mines, Portugal
Siderite from Panasqueira, Portugal — lustrous tan to cream rhombohedra in rosettes and masses; a world-class, modern classic from a magmatic-hydrothermal vein.Read guide
Guide
Siderite from Neudorf, Germany
Neudorf siderite — classic Harz example with lustrous translucent rhombs in brown tones, often on quartz; valued for the Neudorf habit and ore associations.Read guide
Guide
Siderite from Herja Mine, Romania
Herja Mine, Romania — renowned for siderite in late carbonate growth, sulfosalt-rich vugs, and striking black calcite spheres, a top locality for collectors.Read guide
Guide
Siderite from Dal’negorsk, Russia
Dal’negorsk, Russia — siderite from the Nikolaevskiy Mine, famed for warm-brown spheres and pseudomorphs after calcite or aragonite, set in a renowned skarn di…Read guideAbout Siderite
Notable localities for siderite include areas in Portugal, the United Kingdom, Germany, the United States, and Romania, where well-formed crystals and large matrix specimens have been reported. Collectors prize siderite for the warm tonal range of its crystals and the way it can weather into distinctive, earthy matrix hosts, sometimes accompanied by associated minerals such as siderite often occurs with goethite, calcite, or quartz in the same deposit. The mineral’s accessibility at medium to large sizes makes it a favorable target for crystallographic displays and careful cabinet collections.
