How do I identify Posnjakite?

Posnjakite can be identified by its hardness of 2 - 3 on the Mohs scale, Sky-blue to dark-blue color. Look for these key characteristics when examining specimens.

What color is Posnjakite?

Posnjakite typically appears in Sky-blue to dark-blue, may be slightly greenish-blue.. Color can vary depending on impurities and formation conditions.

How hard is Posnjakite?

Posnjakite has a hardness of 2 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

How to Identify Posnjakite | Properties, Meaning & Uses

What is Posnjakite?

Posnjakite is a hydrated copper sulfate mineral. It was discovered in the Tungsten deposit of Nura-Taldy in Karaganda Region in Kazakhstan and described in 1967 by Aleksandr Ivanovich Komkov (1926–1987) and Yevgenii Ivanovich Nefedov (1910–1976) and named after geochemist Eugene Valdemar Posnjak (1888–1949).

Posnjakite Market Value Calculator

Estimate the market value of Posnjakite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Posnjakite Localities Map

See where Posnjakite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

Key Characteristics

Formation of Posnjakite

Posnjakite is an uncommon but widespread secondary mineral in the oxidised zone of copper sulfide deposits, which may be of post-mine formation. It is associated with brochantite, langite, devilline, serpierite, woodwardite, wroewolfeite, aurichalcite, azurite, malachite and chalcopyrite.

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