Ferro-fluoro-pedrizite is a rare lithium-rich amphibole found primarily in alkaline granitic pegmatites. It typically occurs as small prismatic crystals that are challenging to distinguish from other amphiboles without specialized chemical analysis.

Hardness

5-6

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrareLithium-Amphibole Subgroup family

Ferro-fluoro-pedrizite

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

No image

Is this ferro-fluoro-pedrizite?

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 ferro-fluoro-pedrizite with a known reference. Ferro-fluoro-pedrizite 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. Ferro-fluoro-pedrizite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Ferro-fluoro-pedrizite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: yellow, pale brown, colorless.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: prismatic crystals.

Often confused with

Ferro-fluoro-pedrizite vs. its common look-alikes — and how to tell them apart in the field.

How to tell apart: Streak differs — Ferro-fluoro-pedrizite leaves white, Ferro-pedrizite leaves white to pale green.

How to tell apart: Streak differs — Ferro-fluoro-pedrizite leaves white, Arfvedsonite leaves grey to bluish-grey.

Compare →

Often found alongside ferro-fluoro-pedrizite

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

All properties

Chemical formula: NaNa₂(LiAl₂Fe²⁺₂)Si₈O₂₂F₂
Mohs hardness: 5-6
Density: 3.10 g/cm³
Colors: Yellow Pale Brown Colorless
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Monoclinic
Crystal habit: Prismatic Crystals
Cleavage: Perfect in Two Directions
Rarity: Rare
Uses: Collector
Host rock: Granite Pegmatites
Typical price: $50-300 per specimen

Where rockhounds find ferro-fluoro-pedrizite

Classic worldwide localities

Pedriza Massif, Spain

Field-hunting tip

Look in granite pegmatites country — that is the host setting where ferro-fluoro-pedrizite typically forms. If you start seeing albite, quartz, microcline in float, you are in the right ground. Field specimens usually show a prismatic crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify ferro-fluoro-pedrizite?+

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

Where is ferro-fluoro-pedrizite found?+

Notable localities include Pedriza Massif, Spain.

How much is ferro-fluoro-pedrizite 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.

What rocks look like ferro-fluoro-pedrizite?+

Ferro-fluoro-pedrizite is most often confused with Ferro-pedrizite, Arfvedsonite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with ferro-fluoro-pedrizite?+

Ferro-fluoro-pedrizite commonly co-occurs with Albite, Quartz, Microcline, Aegirine. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does ferro-fluoro-pedrizite form in?+

Ferro-fluoro-pedrizite typically forms in granite pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.

What is ferro-fluoro-pedrizite used for?+

Ferro-fluoro-pedrizite is used in collector.

Find ferro-fluoro-pedrizite on the map

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