Schlüterite-(Y) is a rare yttrium aluminium silicate of the Eifel volcanic region, Germany. It is named for the German mineralogist Jochen Schlüter.
Often confused with
Schlüterite-(Y) vs. its common look-alikes, and how to tell them apart in the field.
Often found alongside schlüterite-(y)
Minerals reported to co-occur with schlüterite-(y). Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- (Y,REE)₂AlSi₂O₇(OH)₂F
- Density
- 4.66 g/cm³
- Crystal system
- Monoclinic
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Alkaline Igneous Complexes
Where rockhounds find schlüterite-(y)
Classic worldwide localities
- Mont Saint-Hilaire, Quebec, Canada
Field-hunting tip
Look in alkaline igneous complexes country, the host setting where schlüterite-(y) typically forms. If you start seeing aegirine, microcline, sodalite in float, you are in the right ground.
Common questions
Where is schlüterite-(y) found?+
Notable localities include Mont Saint-Hilaire, Quebec, Canada.
What rocks look like schlüterite-(y)?+
Schlüterite-(Y) is most often confused with Tundrite-(Ce), Tundrite-(Nd). A quick hardness test and a streak check separate the look-alikes faster than color alone.
What minerals are found with schlüterite-(y)?+
Schlüterite-(Y) commonly co-occurs with aegirine, microcline, sodalite, pectolite. Spotting any of these in float or country rock is a useful trip signal.
What kind of rock does schlüterite-(y) form in?+
Schlüterite-(Y) typically forms in alkaline igneous complexes. Working float back to the host body is the standard way to chase a fresh occurrence.
What is schlüterite-(y) used for?+
Schlüterite-(Y) is used in collector.





