Rémondite-(Ce) is a rare rare-earth carbonate mineral found primarily in agpaitic alkaline igneous rocks. It typically forms small, clear, tabular hexagonal crystals often embedded in pegmatite vugs associated with other sodium-rich minerals.

Hardness

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrareBastnäsite Group family

Rémondite-(Ce)

Hardness: 4
Luster: Vitreous
Streak: White
Transparency: Transparent

Is this rémondite-(ce)?

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 rémondite-(ce) with a known reference. Rémondite-(Ce) sits at Mohs 4 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Rémondite-(Ce) leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Rémondite-(Ce) typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: yellow, brown, colorless.
5
Look at form & habit
Crystal system: hexagonal. Typical habit: tabular crystals.

Often found alongside rémondite-(ce)

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

All properties

Chemical formula: Na₃(Ce,La,Nd)₃(CO₃)₅
Mohs hardness: 4
Density: 4.1 g/cm³
Colors: Yellow Brown Colorless
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Hexagonal
Crystal habit: Tabular Crystals
Cleavage: None
Rarity: Rare
Uses: Collector
Host rock: Alkaline Igneous Complexes and Pegmatites
Typical price: $50-300 per thumbnail specimen

Where rockhounds find rémondite-(ce)

Classic worldwide localities

Mont Saint-Hilaire, Quebec, Canada
Kola Peninsula, Russia

Field-hunting tip

Look in alkaline igneous complexes and pegmatites country — that is the host setting where rémondite-(ce) typically forms. If you start seeing aegirine, microcline, analcime 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 rémondite-(ce)?+

Mohs hardness is 4. It typically shows a vitreous luster. The streak is white. Common colors include yellow, brown, colorless.

Where is rémondite-(ce) found?+

Notable localities include Mont Saint-Hilaire, Quebec, Canada; Kola Peninsula, Russia.

How much is rémondite-(ce) worth?+

Typical asking prices fall in the range of $50-300 per thumbnail specimen. Quality, size, and provenance can move individual specimens well outside that range.

What minerals are found with rémondite-(ce)?+

Rémondite-(Ce) commonly co-occurs with Aegirine, Microcline, Analcime, Sodalite, Arfvedsonite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does rémondite-(ce) form in?+

Rémondite-(Ce) typically forms in alkaline igneous complexes and pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.

What is rémondite-(ce) used for?+

Rémondite-(Ce) is used in collector.

Find rémondite-(ce) on the map

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