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, so 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, 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.