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.
Is this rainforest jasper?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry 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.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Rainforest Jasper leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Rainforest Jasper typically shows a waxy to dull luster.
- 4Match the color rangeCompare against the expected color range: green, brown, cream, white, red.
- 5Look at form & habitCrystal system: trigonal. Typical habit: massive.
Often confused with
Rainforest Jasper vs. its common look-alikes — and how to tell them apart in the field.
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 waxy on Brecciated Jasper.
How to tell apart: Luster reads waxy to dull on Rainforest Jasper and vitreous on Unakite.
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
- 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
- Typical price
- $5-50 for slabs or cabochons
Where rockhounds find rainforest jasper
Classic worldwide localities
- Queensland, Australia
Field-hunting tip
Look in rhyolitic volcanic rock country — that is the host setting where rainforest jasper typically forms. If you start seeing quartz, feldspar in float, you are in the right ground. Field specimens usually show a massive habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find rainforest jasper on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
