Georgerobinsonite is a rare lead chromate fluoride mineral characterized by its striking orange-red color and adamantine luster. It typically forms thin, tabular crystals in highly oxidized zones of lead-bearing mineral deposits and is a prized target for advanced micro-mineral collectors.

Hardness

Mohs

Luster

Adamantine

Streak

Orange

Transparency

Transparent

mineralrare

Georgerobinsonite

Hardness: 2
Luster: Adamantine
Streak: Orange
Transparency: Transparent

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Is this georgerobinsonite?

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 georgerobinsonite with a known reference. Georgerobinsonite sits at Mohs 2, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Georgerobinsonite leaves a orange streak.
3
Read the luster
Hold the specimen under a strong light. Georgerobinsonite typically shows a adamantine luster.
4
Match the color range
Compare against the expected color range: red, orange-red.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: tabular crystals.

Often confused with

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

mineral

Crocoite

Mohs 2.5-3

How to tell apart: Streak differs, so Georgerobinsonite leaves orange, Crocoite leaves orange-yellow.

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Often found alongside georgerobinsonite

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

All properties

Chemical formula: Pb₄(CrO₄)₂F₂O
Mohs hardness: 2
Density: 4.57 g/cm³
Colors: Red Orange-red
Streak: Orange
Luster: Adamantine
Transparency: Transparent
Crystal system: Monoclinic
Crystal habit: Tabular Crystals
Cleavage: None
Rarity: Rare
Uses: Collector
Host rock: Oxidized Lead Ore Zones
Typical price: $200-2000+ per specimen depending on size and quality

Where rockhounds find georgerobinsonite

Classic worldwide localities

Republic Mine, Washington, USA

Field-hunting tip

Look in oxidized lead ore zones country, the host setting where georgerobinsonite typically forms. If you start seeing cerussite, galena, leadhillite in float, you are in the right ground. Field specimens usually show a tabular crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify georgerobinsonite?+

Mohs hardness is 2. It typically shows a adamantine luster. The streak is orange. Common colors include red, orange-red.

Where is georgerobinsonite found?+

Notable localities include Republic Mine, Washington, USA.

How much is georgerobinsonite worth?+

Typical asking prices fall in the range of $200-2000+ per specimen depending on size and quality. Quality, size, and provenance can move individual specimens well outside that range.

Is georgerobinsonite safe to handle?+

It contains toxic constituents. Contains lead and chromium; handle with care, avoid creating dust, and wash hands thoroughly after handling. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like georgerobinsonite?+

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

What minerals are found with georgerobinsonite?+

Georgerobinsonite commonly co-occurs with cerussite, galena, leadhillite, calcite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does georgerobinsonite form in?+

Georgerobinsonite typically forms in oxidized lead ore zones. Working float back to the host body is the standard way to chase a fresh occurrence.

What is georgerobinsonite used for?+

Georgerobinsonite is used in collector.

Find georgerobinsonite on the map

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