Menzerite-(Y) is a rare member of the garnet group specifically enriched in yttrium and other rare earth elements. It typically appears as dark, dodecahedral crystals in silica-undersaturated or rare-metal pegmatites, often requiring laboratory analysis for definitive identification due to its similarity to other garnets.

Hardness

7-7.5

Mohs

Transparency

Transparent

mineralrareGarnet Group family

Menzerite-(Y)

Hardness: 7-7.5
Transparency: Transparent

No image

Is this menzerite-(y)?

3-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 menzerite-(y) with a known reference. Menzerite-(Y) sits at Mohs 7-7.5, softer than the next harder reference, harder than the previous one.
2
Match the color range
Compare against the expected color range: brown, black.
3
Look at form & habit
Crystal system: cubic. Typical habit: dodecahedral crystals, massive.

Often confused with

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

Often found alongside menzerite-(y)

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

Almandine
mineral · Mohs 7-7.5

All properties

Chemical formula: CaY₂Mg₂Si₃O₁₂
Mohs hardness: 7-7.5
Density: 4.31 g/cm³
Colors: Brown Black
Transparency: Transparent
Crystal system: Cubic
Crystal habit: Dodecahedral crystals, massive
Cleavage: None
Rarity: Rare
Uses: Collector, Scientific research
Host rock: As cores and remnants in composite almandine crystals in a felsic granulite

Where rockhounds find menzerite-(y)

Classic worldwide localities

Sweden
Canada
Russia
USA

Field-hunting tip

Where it forms: As cores and remnants in composite almandine crystals in a felsic granulite. If you start seeing almandine in float, you are in the right ground. Typical habit: dodecahedral crystals, massive. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify menzerite-(y)?+

Mohs hardness is 7-7.5. Common colors include brown, black.

Where is menzerite-(y) found?+

Notable localities include Sweden; Canada; Russia; USA.

Is menzerite-(y) safe to handle?+

Contains rare earth elements and potential trace thorium; handle with care and wash hands after contact.

What rocks look like menzerite-(y)?+

Menzerite-(Y) is most often confused with Almandine, Spessartine, Andradite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

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

Menzerite-(Y) commonly co-occurs with Almandine. Spotting any of these in float or country rock is a useful trip signal.

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

Where it forms: As cores and remnants in composite almandine crystals in a felsic granulite. Working float back to the host body is the standard way to chase a fresh occurrence.

What is menzerite-(y) used for?+

Menzerite-(Y) is used in collector, scientific research.

Find menzerite-(y) on the map

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