Amamoorite is a rare zeolite mineral specifically identified from the Amamoor district in Queensland, Australia. It occurs primarily as thin, bladed crystals and is considered a distinctive locality variant within the stilbite group.

Hardness

3.5-4

Mohs

Luster

Vitreous

Streak

White

Transparency

Translucent

mineralrareStilbite-Ca family

Amamoorite

Hardness: 3.5-4
Luster: Vitreous
Streak: White
Transparency: Translucent

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Is this amamoorite?

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 amamoorite with a known reference. Amamoorite sits at Mohs 3.5-4 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Amamoorite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Amamoorite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: white, yellowish-white, colorless.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: bladed.

Often confused with

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

How to tell apart: Luster reads vitreous on Amamoorite and vitreous to pearly on Heulandite.

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Often found alongside amamoorite

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

All properties

Chemical formula: NaCa₄(Si₂₇Al₉)O₇₂·28H₂O
Mohs hardness: 3.5-4
Density: 2.1-2.2 g/cm³
Colors: White Yellowish-white Colorless
Streak: White
Luster: Vitreous
Transparency: Translucent
Crystal system: Monoclinic
Crystal habit: Bladed
Cleavage: Perfect
Rarity: Rare
Uses: Collector
Host rock: Volcanic Rocks
Typical price: $20-100 thumbnail

Where rockhounds find amamoorite

Classic worldwide localities

Amamoor, Queensland, Australia

Field-hunting tip

Look in volcanic rocks country — that is the host setting where amamoorite typically forms. If you start seeing quartz, calcite, zeolites in float, you are in the right ground. Field specimens usually show a bladed habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify amamoorite?+

Mohs hardness is 3.5-4. It typically shows a vitreous luster. The streak is white. Common colors include white, yellowish-white, colorless.

Where is amamoorite found?+

Notable localities include Amamoor, Queensland, Australia.

How much is amamoorite worth?+

Typical asking prices fall in the range of $20-100 thumbnail. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like amamoorite?+

Amamoorite is most often confused with Stilbite-Ca, Heulandite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with amamoorite?+

Amamoorite commonly co-occurs with Quartz, Calcite, Zeolites. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does amamoorite form in?+

Amamoorite typically forms in volcanic rocks. Working float back to the host body is the standard way to chase a fresh occurrence.

What is amamoorite used for?+

Amamoorite is used in collector.

Find amamoorite on the map

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