Messelite is a rare phosphate mineral typically found as small, thin tabular crystals or radial clusters. It is often discovered in phosphate-rich environments where it may be associated with other iron-bearing minerals like vivianite.

Hardness

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrareVivianite Group family

Messelite

Hardness: 3
Luster: Vitreous
Streak: White
Transparency: Transparent

Is this messelite?

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 messelite with a known reference. Messelite sits at Mohs 3 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Messelite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Messelite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: colorless, white, pale yellow, pale green.
5
Look at form & habit
Crystal system: triclinic. Typical habit: tabular crystals, radiating aggregates, crusts.

Often confused with

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

mineral

Vivianite

Mohs 1.5-2

How to tell apart: Messelite is noticeably harder (Mohs 3 vs. 1.5-2); streak differs — Messelite leaves white, Vivianite leaves white to light blue.

Often found alongside messelite

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

All properties

Chemical formula: Ca₂Fe²⁺(PO₄)₂·2H₂O
Mohs hardness: 3
Density: 2.5-2.6 g/cm³
Colors: Colorless White Pale Yellow Pale Green
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Triclinic
Crystal habit: Tabular Crystals, Radiating Aggregates, Crusts
Cleavage: Perfect in One Direction
Rarity: Rare
Uses: Collector
Host rock: Hydrothermal Veins, Phosphate-rich Sedimentary Rocks, And Cavities in Volcanic Rocks
Typical price: $20-150 for micro-mounts or small specimens

Where rockhounds find messelite

Classic worldwide localities

Messel, Germany
Königswart, Czech Republic
Big Fish River, Yukon, Canada
Sapucaia pegmatite, Brazil

Field-hunting tip

Look in hydrothermal veins, phosphate-rich sedimentary rocks, and cavities in volcanic rocks country — that is the host setting where messelite typically forms. If you start seeing vivianite, siderite, strengite in float, you are in the right ground. Field specimens usually show a tabular crystals, radiating aggregates, crusts habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify messelite?+

Mohs hardness is 3. It typically shows a vitreous luster. The streak is white. Common colors include colorless, white, pale yellow, pale green.

Where is messelite found?+

Notable localities include Messel, Germany; Königswart, Czech Republic; Big Fish River, Yukon, Canada; Sapucaia pegmatite, Brazil.

How much is messelite worth?+

Typical asking prices fall in the range of $20-150 for micro-mounts or small specimens. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like messelite?+

Messelite is most often confused with Vivianite, Anapaite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with messelite?+

Messelite commonly co-occurs with Vivianite, Siderite, Strengite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does messelite form in?+

Messelite typically forms in hydrothermal veins, phosphate-rich sedimentary rocks, and cavities in volcanic rocks. Working float back to the host body is the standard way to chase a fresh occurrence.

What is messelite used for?+

Messelite is used in collector.

Find messelite on the map

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