Arrojadite-(SrFe) is a rare phosphate mineral found primarily in complex granitic pegmatites. It typically occurs as massive, granular aggregates with a characteristic dark brownish-green hue and vitreous luster, often appearing in association with other phosphate minerals.

Hardness

4-5

Mohs

Luster

Vitreous

Streak

White

Transparency

Translucent

mineralrareArrojadite Group family

Arrojadite-(SrFe)

Hardness: 4-5
Luster: Vitreous
Streak: White
Transparency: Translucent

No image

Is this arrojadite-(srfe)?

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 arrojadite-(srfe) with a known reference. Arrojadite-(SrFe) sits at Mohs 4-5 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Arrojadite-(SrFe) leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Arrojadite-(SrFe) typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: dark green, brownish green, brown.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: granular, massive, rarely in imperfect crystals.

Often confused with

Arrojadite-(SrFe) vs. its common look-alikes — and how to tell them apart in the field.

Often found alongside arrojadite-(srfe)

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

All properties

Chemical formula: SrNa₂CaFe²⁺₁₃Al(PO₄)₁₁(OH)₂
Mohs hardness: 4-5
Density: 3.58 g/cm³
Colors: Dark Green Brownish Green Brown
Streak: White
Luster: Vitreous
Transparency: Translucent
Crystal system: Monoclinic
Crystal habit: Granular, Massive, Rarely in Imperfect Crystals
Cleavage: Poor
Rarity: Rare
Uses: Collector, Scientific Research
Host rock: Granite Pegmatites
Typical price: $50-300 depending on specimen size and rarity

Where rockhounds find arrojadite-(srfe)

Classic worldwide localities

Norrö, Rånö, Sweden
Pegmatite de l'Estrie, Canada
Black Hills, South Dakota, USA

Field-hunting tip

Look in granite pegmatites country — that is the host setting where arrojadite-(srfe) typically forms. If you start seeing quartz, albite, muscovite in float, you are in the right ground. Field specimens usually show a granular, massive, rarely in imperfect crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify arrojadite-(srfe)?+

Mohs hardness is 4-5. It typically shows a vitreous luster. The streak is white. Common colors include dark green, brownish green, brown.

Where is arrojadite-(srfe) found?+

Notable localities include Norrö, Rånö, Sweden; Pegmatite de l'Estrie, Canada; Black Hills, South Dakota, USA.

How much is arrojadite-(srfe) worth?+

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

What rocks look like arrojadite-(srfe)?+

Arrojadite-(SrFe) is most often confused with Triphylite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with arrojadite-(srfe)?+

Arrojadite-(SrFe) commonly co-occurs with Quartz, Albite, Muscovite, Apatite, Beryl. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does arrojadite-(srfe) form in?+

Arrojadite-(SrFe) typically forms in granite pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.

What is arrojadite-(srfe) used for?+

Arrojadite-(SrFe) is used in collector, scientific research.

Find arrojadite-(srfe) on the map

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