Manganoeudialyte is a manganese-rich member of the complex eudialyte group found in alkaline igneous environments. It is highly valued by collectors for its vibrant pink to magenta hues and often occurs as tabular crystals or massive grains within nepheline syenites.

Hardness

5-6

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent to translucent

mineralrareEudialyte Group family

Manganoeudialyte

Hardness: 5-6
Luster: Vitreous
Streak: White
Transparency: Transparent to translucent

Is this manganoeudialyte?

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 manganoeudialyte with a known reference. Manganoeudialyte sits at Mohs 5-6, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Streak: white.
3
Read the luster
Hold the specimen under a strong light. Luster: vitreous.
4
Match the color range
Compare against the expected color range: pink, purple.
5
Look at form & habit
Crystal system: trigonal. Typical habit: tabular crystals, massive, granular.

Often confused with

Manganoeudialyte vs. its common look-alikes, and how to tell them apart in the field.

How to tell apart: Streak differs, so Manganoeudialyte leaves white, Aegirine leaves pale yellowish gray.

How to tell apart: Luster reads vitreous on Manganoeudialyte and adamantine on Wadeite.

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Often found alongside manganoeudialyte

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

All properties

Chemical formula: Na₁₄Ca₆Mn₃Zr₃[Si₂₆O₇₂(OH)₂](H₂O,Cl,O,OH)₆
Mohs hardness: 5-6
Density: 2.890 g/cm³
Colors: Pink Purple
Streak: White
Luster: Vitreous
Transparency: Transparent to translucent
Crystal system: Trigonal
Crystal habit: Tabular crystals, massive, granular
Cleavage: None
Rarity: Rare
Uses: Collector, Geological study
Host rock: An interstitial phase in nepheline syenite (khibinite)

Where rockhounds find manganoeudialyte

Classic worldwide localities

Kola Peninsula, Russia
Mont Saint-Hilaire, Canada
Norra Kärr, Sweden

Field-hunting tip

Where it forms: An interstitial phase in nepheline syenite (khibinite). If you start seeing eudialyte, k-feldspar, nepheline in float, you are in the right ground. Typical habit: tabular crystals, massive, granular. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify manganoeudialyte?+

Mohs hardness is 5-6. Luster: vitreous. The streak is white. Common colors include pink, purple.

Where is manganoeudialyte found?+

Notable localities include Kola Peninsula, Russia; Mont Saint-Hilaire, Canada; Norra Kärr, Sweden.

Is manganoeudialyte safe to handle?+

Contains trace amounts of rare earth elements and uranium; avoid inhaling dust when cutting or grinding and store away from living areas.

What rocks look like manganoeudialyte?+

Manganoeudialyte is most often confused with Eudialyte, Aegirine, Wadeite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with manganoeudialyte?+

Manganoeudialyte commonly co-occurs with Eudialyte, K-feldspar, Nepheline, Aegirine, Analcime, Sodalite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does manganoeudialyte form in?+

Where it forms: An interstitial phase in nepheline syenite (khibinite). Working float back to the host body is the standard way to chase a fresh occurrence.

What is manganoeudialyte used for?+

Manganoeudialyte is used in collector, geological study.

Find manganoeudialyte on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.