Rainforest Jasper is technically a rhyolitic volcanic rock composed primarily of microcrystalline quartz. It is recognized by its distinct circular or irregular patterns in shades of green, cream, and brown, formed by the mineralization of gas bubbles in ancient lava flows.

Hardness

6.5-7

Mohs

Luster

Waxy to dull

Streak

White

Transparency

Opaque

mineralcommonQuartz family

Rainforest Jasper

Also: Rainforest Rhyolite, Australian Rainforest Jasper

Hardness: 6.5-7
Luster: Waxy to dull
Streak: White
Transparency: Opaque

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Is this rainforest jasper?

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 rainforest jasper with a known reference. Rainforest Jasper sits at Mohs 6.5-7, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Streak: white.
3
Read the luster
Hold the specimen under a strong light. Luster: waxy to dull.
4
Match the color range
Compare against the expected color range: green, brown, cream, white, red.
5
Look at form & habit
Crystal system: trigonal. Typical habit: massive.

Often confused with

Rainforest Jasper vs. its common look-alikes, and how to tell them apart in the field.

igneous

Rhyolite

Mohs 6-7

How to tell apart: Luster reads waxy to dull on Rainforest Jasper and dull on Rhyolite.

How to tell apart: Luster reads waxy to dull on Rainforest Jasper and vitreous on Unakite.

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Often found alongside rainforest jasper

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

All properties

Chemical formula: SiO₂
Mohs hardness: 6.5-7
Density: 2.6-2.7 g/cm³
Colors: Green Brown Cream White Red
Streak: White
Luster: Waxy to dull
Transparency: Opaque
Crystal system: Trigonal
Crystal habit: Massive
Cleavage: None
Rarity: Common
Uses: Lapidary, Decorative, Collector
Host rock: rhyolitic volcanic rock

Where rockhounds find rainforest jasper

Classic worldwide localities

Queensland, Australia

Field-hunting tip

Where it forms: rhyolitic volcanic rock. If you start seeing quartz, feldspar in float, you are in the right ground. Typical habit: massive. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify rainforest jasper?+

Mohs hardness is 6.5-7. Luster: waxy to dull. The streak is white. Common colors include green, brown, cream, white.

Where is rainforest jasper found?+

Notable localities include Queensland, Australia.

What rocks look like rainforest jasper?+

Rainforest Jasper is most often confused with Rhyolite, Brecciated Jasper, Unakite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with rainforest jasper?+

Rainforest Jasper commonly co-occurs with Quartz, Feldspar. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does rainforest jasper form in?+

Where it forms: rhyolitic volcanic rock. Working float back to the host body is the standard way to chase a fresh occurrence.

What is rainforest jasper used for?+

Rainforest Jasper is used in lapidary, decorative, collector.

Find rainforest jasper on the map

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