Rinkite-(Y) is a complex sorosilicate mineral found primarily in alkaline igneous rocks. It typically forms yellow to brown prismatic crystals and is prized by collectors of rare earth minerals for its association with exotic pegmatite assemblages.

Hardness

Mohs

Luster

Vitreous

Streak

White

Transparency

Translucent

mineralrareRinkite Group family

Rinkite-(Y)

Hardness: 5
Luster: Vitreous
Streak: White
Transparency: Translucent

Is this rinkite-(y)?

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

Often confused with

Rinkite-(Y) vs. its common look-alikes — and how to tell them apart in the field.

Often found alongside rinkite-(y)

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

All properties

Chemical formula: (Na,Ca,Ce)₂(Ca,Ce)₄(Ti,Nb)(Si₂O₇)₂F₄
Mohs hardness: 5
Density: 3.36-3.46 g/cm³
Colors: Yellow Brown Yellow-brown
Streak: White
Luster: Vitreous
Transparency: Translucent
Crystal system: Monoclinic
Crystal habit: Prismatic Crystals
Cleavage: Distinct
Rarity: Rare
Uses: Collector
Host rock: Nepheline Syenite and Alkaline Pegmatites
Typical price: $30-150 for small specimens

Where rockhounds find rinkite-(y)

Classic worldwide localities

Kola Peninsula, Russia
Mont Saint-Hilaire, Canada
Greenland

Field-hunting tip

Look in nepheline syenite and alkaline pegmatites country — that is the host setting where rinkite-(y) typically forms. If you start seeing aegirine, nepheline, eudialyte in float, you are in the right ground. Field specimens usually show a prismatic crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify rinkite-(y)?+

Mohs hardness is 5. It typically shows a vitreous luster. The streak is white. Common colors include yellow, brown, yellow-brown.

Where is rinkite-(y) found?+

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

How much is rinkite-(y) worth?+

Typical asking prices fall in the range of $30-150 for small specimens. Quality, size, and provenance can move individual specimens well outside that range.

Is rinkite-(y) safe to handle?+

This mineral is radioactive. Contains minor rare earth elements and trace thorium, requiring standard mineral handling precautions such as washing hands after handling and avoiding ingestion or inhalation of dust. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like rinkite-(y)?+

Rinkite-(Y) is most often confused with Götzenite, Wöhlerite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with rinkite-(y)?+

Rinkite-(Y) commonly co-occurs with Aegirine, Nepheline, Eudialyte, Microcline. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does rinkite-(y) form in?+

Rinkite-(Y) typically forms in nepheline syenite and alkaline pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.

What is rinkite-(y) used for?+

Rinkite-(Y) is used in collector.

Find rinkite-(y) on the map

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