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Gerhardtite

Gerhardtite specimens for sale

4 for sale · $275–$7,500 USD

4 in the gallery

Gerhardtite is a copper nitrate hydroxide mineral that forms as small, often tabular or needle-like crystals. It typically displays a blue to greenish color and a vitreous to dull lustre, commonly occurring in aggregates or crusts on sulfate-rich hosts. The mineral's scarcity and distinctive copper-based chemistry make its crystals and microcrystalline textures of interest to collectors. Notable specimens have come from DR Congo and the United States, where secondary copper mineralization and oxidation zones provide the right conditions for its formation.

Formula
Cu2(NO3)(OH)3
Rarity
Rare
Stability
Moderately Stable
Collector interest
Niche Interest

Buy Gerhardtite specimens

View all 4
Gerhardtite image
Gerhardtite
Crystal Classics
$1,250
Gerhardtite image
Gerhardtite
Crystal Classics
$7,500
Cuprite image
Cuprite
Crystal Classics
$1,500
Gerhardtite from Likasi, Haut-Katanga, DR Congo image
Gerhardtite from Likasi, Haut-Katanga, DR Congo
Weinrich Minerals
$275

Where Gerhardtite is found

Top localities

  1. Likasi3 specimens
  2. Ontonagon County1 specimen
  3. Tenke-Fungurume area1 specimen

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About Gerhardtite

Collectors value gerhardtite for its rarity and unique composition among secondary copper minerals. While not widespread, the best specimens exhibit clear crystal forms or coatings that highlight the mineral’s copper-rich chemistry and geometric habit. Specimens are most often sought by those focused on copper minerals or nitrate-bearing assemblages, and they are prized for quality of color, luster, and crystal integrity when available.