Adamite

Adamite specimens for sale

84 for sale · $75–$7,500 USD

518 in the gallery

Adamite is a zinc arsenate mineral that commonly forms prismatic to tabular crystals and radiating or acicular aggregates. It typically displays bright green to yellow-green colors and a vitreous to adamantine luster, often occurring in well-formed crystals or tiny, glittering fans in secondary parageneses. Specimens are frequently associated with secondary oxide and sulfide minerals in oxidized ore deposits, and notable localities yield rich, lightly bladed or prismatic crystals that are highly photogenic for collection and display.

Formula
Zn2(AsO4)(OH)
Rarity
Rare
Stability
Moderately Stable
Collector interest
Very High Interest
Classification notes
Arsenate mineral; zinc-arsenate hydrate (Zn2AsO4(OH)2)

Key characteristics

Crystal system
orthorhombic
Mohs hardness
3.5
Specific gravity
4.3–4.5
Luster
vitreous, adamantine
Transparency
transparent, translucent
Color
colorless, white, yellow, green, blue, pink, violet, brown
Streak
white
Cleavage
distinct
Fracture
uneven, subconchoidal
Crystal habit
prismatic, tabular, acicular, radiating, botryoidal, druzy, granular, massive
  • Fluorescent: green, yellow
  • Classic / historic

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Where Adamite is found

Top localities

  1. Ojuela Mine328 specimens
  2. Hilarion Mine35 specimens
  3. Mapimí19 specimens
  4. Kamariza Mines16 specimens
  5. Tsumeb15 specimens
  6. Gold Hill Mine7 specimens
  7. Mohawk mine6 specimens
  8. Christiana Mine4 specimens
  9. West Camp4 specimens
  10. Gold Hill2 specimens

About Adamite

Among the well-known sources are Mexico and Namibia, with classic pockets producing sharp crystals that can be sunlit and highly reflective. Other significant sites include Greece, the United States, and Russia, where adamite occurs in desert varnish or secondary sulfide-rich zones and forms distinctive crystals that enhance display cases. Collectors value adamite for its vibrant coloration, varied crystal habits, and the way light plays on the transparent to translucent faces. Its relative rarity in well-formed crystals and its dramatic bouquet of forms make it a desirable addition to mineral cabinets and display specimens.