Destinezite is a rare phosphate mineral typically found as secondary crusts or nodules in sedimentary deposits. Collectors should look for its characteristic earthy, reniform appearance, which often results from the alteration of iron-bearing minerals in phosphate-rich environments.

Hardness

3-4

Mohs

Luster

Dull

Streak

White

Transparency

Opaque

mineralrareCrandallite Group family

Destinezite

Also: Delvauxite

Hardness: 3-4
Luster: Dull
Streak: White
Transparency: Opaque

Is this destinezite?

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 destinezite with a known reference. Destinezite sits at Mohs 3-4 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Destinezite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Destinezite typically shows a dull luster.
4
Match the color range
Compare against the expected color range: yellow, brown, white, yellow-brown.
5
Look at form & habit
Crystal system: triclinic. Typical habit: massive, reniform, concretionary, or powdery encrustations.

Often confused with

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

mineral

Crandallite

Mohs 5

How to tell apart: Crandallite is the harder of the two (Mohs 5 vs. 3-4); luster reads dull on Destinezite and vitreous on Crandallite.

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Often found alongside destinezite

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

All properties

Chemical formula: Fe³⁺₂(PO₄)(SO₄)(OH)·6H₂O
Mohs hardness: 3-4
Density: 2.2-2.5 g/cm³
Colors: Yellow Brown White Yellow-brown
Streak: White
Luster: Dull
Transparency: Opaque
Crystal system: Triclinic
Crystal habit: Massive, Reniform, Concretionary, Or Powdery Encrustations
Cleavage: None
Rarity: Rare
Uses: Collector
Host rock: Sedimentary Phosphate Deposits
Typical price: $20-100 for small study specimens

Where rockhounds find destinezite

Classic worldwide localities

Belgium
Czech Republic
Germany

Field-hunting tip

Look in sedimentary phosphate deposits country — that is the host setting where destinezite typically forms. If you start seeing vivianite, limonite, pyrite in float, you are in the right ground. Field specimens usually show a massive, reniform, concretionary, or powdery encrustations habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify destinezite?+

Mohs hardness is 3-4. It typically shows a dull luster. The streak is white. Common colors include yellow, brown, white, yellow-brown.

Where is destinezite found?+

Notable localities include Belgium; Czech Republic; Germany.

How much is destinezite worth?+

Typical asking prices fall in the range of $20-100 for small study specimens. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like destinezite?+

Destinezite is most often confused with Crandallite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with destinezite?+

Destinezite commonly co-occurs with Vivianite, Limonite, Pyrite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does destinezite form in?+

Destinezite typically forms in sedimentary phosphate deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is destinezite used for?+

Destinezite is used in collector.

Find destinezite on the map

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