Obradovicite-NaNa is a rare arsenate mineral characterized by its vibrant yellow, platy crystals. It typically forms in the hyper-arid oxidized environments of copper mines, appearing as delicate crusts or aggregate clusters.

Hardness

2-3

Mohs

Luster

Vitreous

Streak

Yellow

Transparency

Translucent

mineralrareObradovicite Group family

Obradovicite-NaNa

Hardness: 2-3
Luster: Vitreous
Streak: Yellow
Transparency: Translucent

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Is this obradovicite-nana?

5-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

1
Test the hardness
Try to scratch obradovicite-nana with a known reference. Obradovicite-NaNa sits at Mohs 2-3 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Obradovicite-NaNa leaves a yellow streak.
3
Read the luster
Hold the specimen under a strong light. Obradovicite-NaNa typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: yellow, orange-yellow.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: platy crystals, tabular aggregates.

Often confused with

Obradovicite-NaNa vs. its common look-alikes — and how to tell them apart in the field.

How to tell apart: Gartrellite is the harder of the two (Mohs 4 vs. 2-3); streak differs — Obradovicite-NaNa leaves yellow, Gartrellite leaves pale green.

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Often found alongside obradovicite-nana

Minerals reported to co-occur with obradovicite-nana. Spotting these in float or country rock is a strong cue you are in the right ground.

All properties

Chemical formula: Na₄CuFe₂(AsO₄)₄(OH)₂·10H₂O
Mohs hardness: 2-3
Density: 3.5-4 g/cm³
Colors: Yellow Orange-yellow
Streak: Yellow
Luster: Vitreous
Transparency: Translucent
Crystal system: Monoclinic
Crystal habit: Platy Crystals, Tabular Aggregates
Cleavage: Perfect
Rarity: Rare
Uses: Collector
Host rock: Oxidized Zones of Copper Deposits
Typical price: $50-300 per specimen

Where rockhounds find obradovicite-nana

Classic worldwide localities

Chuquicamata Mine, Chile

Field-hunting tip

Look in oxidized zones of copper deposits country — that is the host setting where obradovicite-nana typically forms. If you start seeing kröhnkite, chalcanthite, cuprite in float, you are in the right ground. Field specimens usually show a platy crystals, tabular aggregates habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify obradovicite-nana?+

Mohs hardness is 2-3. It typically shows a vitreous luster. The streak is yellow. Common colors include yellow, orange-yellow.

Where is obradovicite-nana found?+

Notable localities include Chuquicamata Mine, Chile.

How much is obradovicite-nana worth?+

Typical asking prices fall in the range of $50-300 per specimen. Quality, size, and provenance can move individual specimens well outside that range.

Is obradovicite-nana safe to handle?+

It contains toxic constituents. Contains arsenic and copper; wash hands thoroughly after handling and avoid inhaling dust or ingestion. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like obradovicite-nana?+

Obradovicite-NaNa is most often confused with Obradovicite-KCu, Gartrellite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with obradovicite-nana?+

Obradovicite-NaNa commonly co-occurs with Kröhnkite, Chalcanthite, Cuprite, Atacamite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does obradovicite-nana form in?+

Obradovicite-NaNa typically forms in oxidized zones of copper deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is obradovicite-nana used for?+

Obradovicite-NaNa is used in collector.

Find obradovicite-nana on the map

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