Eveslogite is a rare complex silicate mineral found primarily within the hyper-alkaline environments of the Kola Peninsula. It is typically identified by its fibrous to acicular habit forming delicate radial sprays or felt-like masses in cavities within alkaline pegmatites.

Hardness

5-6

Mohs

Luster

Vitreous

Streak

White

Transparency

Translucent

mineralrarenull family

Eveslogite

Hardness: 5-6
Luster: Vitreous
Streak: White
Transparency: Translucent

No image

Is this eveslogite?

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 eveslogite with a known reference. Eveslogite 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. Eveslogite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Eveslogite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: white, pale pink, colorless.
5
Look at form & habit
Crystal system: orthorhombic. Typical habit: fibrous aggregates, radial sprays, fine-grained masses.

Often found alongside eveslogite

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

All properties

Chemical formula: (K,Na,Ca,Ba)₁₄(Ca,Mn)₈(Fe,Mg,Fe)₈(Si,Al,Be)₄₈(O,OH,F)₁₂₈·nH₂O
Mohs hardness: 5-6
Density: 2.73 g/cm³
Colors: White Pale Pink Colorless
Streak: White
Luster: Vitreous
Transparency: Translucent
Crystal system: Orthorhombic
Crystal habit: Fibrous Aggregates, Radial Sprays, Fine-grained Masses
Cleavage: Perfect
Rarity: Rare
Uses: Collector
Host rock: Alkaline Igneous Rocks, Specifically Pegmatites
Typical price: $50-300 per specimen depending on size and quality

Where rockhounds find eveslogite

Classic worldwide localities

Khibiny Massif, Kola Peninsula, Russia
Lovozero Massif, Kola Peninsula, Russia

Field-hunting tip

Look in alkaline igneous rocks, specifically pegmatites country — that is the host setting where eveslogite typically forms. If you start seeing aegirine, nepheline, kalsilite in float, you are in the right ground. Field specimens usually show a fibrous aggregates, radial sprays, fine-grained masses habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify eveslogite?+

Mohs hardness is 5-6. It typically shows a vitreous luster. The streak is white. Common colors include white, pale pink, colorless.

Where is eveslogite found?+

Notable localities include Khibiny Massif, Kola Peninsula, Russia; Lovozero Massif, Kola Peninsula, Russia.

How much is eveslogite worth?+

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

What minerals are found with eveslogite?+

Eveslogite commonly co-occurs with Aegirine, Nepheline, Kalsilite, Eudialyte. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does eveslogite form in?+

Eveslogite typically forms in alkaline igneous rocks, specifically pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.

What is eveslogite used for?+

Eveslogite is used in collector.

Find eveslogite on the map

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