$140Median
1Sold (12 mo)
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Arthurite specimens for sale
6 for sale · $75–$900 USD
1 in the gallery
Arthurite is a secondary copper-iron arsenate mineral that forms as hydrated, often orange-brown to yellow-brown crystals. It crystallizes in the monoclinic system and commonly occurs in botryoidal to tabular habits, with a vitreous to resinous luster. The mineral is associated with oxidation zones of arsenic-rich copper deposits, and notable specimens have been recovered from European localities, including Norway and the United Kingdom, where well-formed crystals have been described. Collectors prize Arthurite for its distinctive color, layered crystal forms, and the rarity of good, well-preserved specimens obtainable from classic localities.
- Formula
- CuFe3+2(AsO4)2(OH)2 · 4H2O
- Rarity
- Uncommon
- Stability
- Moderately Stable
- Collector interest
- Moderate Interest
- Classification notes
- Phosphates, Arsenates and Vanadates; Arsenates with copper and iron; Strunz/Dana grouping varies (arsenates with metal cations)
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About Arthurite
Because Arthurite incorporates copper and iron in its structure with arsenate groups, it often occurs in relatively fragile aggregation, so careful handling and display are advised. Its appearance—orange-brown to yellow-brown plating and translucent to transparent areas—can make it a striking contrast against other copper minerals. For the dedicated mineral enthusiast, Arthurite offers a window into secondary alteration processes in arsenic-bearing environments and a connection to European mineral heritage through historic collection sites.
