Manganonaujakasite is a rare manganese-dominant analogue of naujakasite found primarily within the highly alkaline rocks of the Ilímaussaq complex in Greenland. It is most commonly identified by its platy, micaceous habit and distinctive pale pink to colorless appearance within pegmatitic veins.
Is this manganonaujakasite?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch manganonaujakasite with a known reference. Manganonaujakasite sits at Mohs 2.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Manganonaujakasite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Manganonaujakasite typically shows a pearly luster.
- 4Match the color rangeCompare against the expected color range: pink, pale red, colorless.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: platy or micaceous aggregates.
Often confused with
Manganonaujakasite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside manganonaujakasite
Minerals reported to co-occur with manganonaujakasite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Na₆(Mn,Fe)Al₄Si₈O₂₆
- Mohs hardness
- 2.5
- Density
- 2.68 g/cm³
- Streak
- White
- Luster
- Pearly
- Transparency
- Translucent
- Crystal system
- Monoclinic
- Crystal habit
- Platy or Micaceous Aggregates
- Cleavage
- Perfect Basal
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Agpaitic Nepheline Syenite
- Typical price
- $50-300 per specimen
Where rockhounds find manganonaujakasite
Classic worldwide localities
- Ilímaussaq complex (Greenland)
Field-hunting tip
Look in agpaitic nepheline syenite country — that is the host setting where manganonaujakasite typically forms. If you start seeing eudialyte, sodalite, nepheline in float, you are in the right ground. Field specimens usually show a platy or micaceous aggregates habit, so train your eye for that shape before scanning the outcrop.
Common questions
How do you identify manganonaujakasite?+
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What rocks look like manganonaujakasite?+
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Find manganonaujakasite on the map
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