Mcgovernite specimens for sale
1 for sale · $250 USD
4 in the gallery
Mcgovernite is a rare arsenate-arsenite-silicate hydroxide mineral that forms in trigonal crystals with a vitreous to pearly luster. Its color range includes brown and red, and specimens are typically translucent with a brown streak. Habits are described as massive or granular, reflecting its often encrusted or aggregated crystal assemblies. The mineral’s chemical complexity includes manganese, zinc, arsenate, and silicate components, giving it a distinctive, dense look that collectors seek.
- Formula
- Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21
- Rarity
- Rare
- Stability
- Stable
- Collector interest
- High Interest
- Classification notes
- Complex manganese-zinc arsenate-arsenite-silicate hydroxide.
Key characteristics
- Crystal system
- trigonal
- Mohs hardness
- 3
- Specific gravity
- 3.72
- Luster
- vitreous, pearly
- Transparency
- translucent
- Color
- brown, red
- Streak
- brown
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- massive, granular
- Classic / historic
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Where Mcgovernite is found
Top localities
- Franklin1 specimen
About Mcgovernite
Notable specimens have come from classic localities that produced historic manganese- and arsenate-bearing minerals. The rarity and intricate chemistry of Mcgovernite make it a target for specialists who track complex arsenate varieties. Its stable nature and relatively low hardness (Mohs 3) mean that carefully prepared, well-protected samples showcase the mineral’s subtle color variations and textural contrasts, adding depth to mineral cabinets and reference collections.
Collectors value Mcgovernite for its status as a historic species and for the challenge of acquiring representative, architecture-like aggregates. The combination of its unusual composition, trigonal habit, and classic appearance provides an appealing focal point for studied displays and mineralogical narratives.