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, 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.