Rainforest Jasper
Rainforest Jasper is igneous (spherulitic rhyolite). In the hand, it rates 6 to 7 on the Mohs scale, and it runs moss green and cream. Mossy green rhyolite crowded with round spherulites and orb rings in cream, rust, and brown, sometimes with small drusy quartz pockets. Mount Hay, near Rockhampton, Queensland, Australia.
The geology.
Rainforest Jasper carries the formula Rhyolite: quartz, feldspar, glass with spherulites. It belongs to the not applicable (rock) system. Catalogues list it as igneous (spherulitic rhyolite).
It sits at 6 to 7 on the Mohs scale. The surface reads vitreous to matte on polish. Light behaviour is opaque. Specific gravity runs 2.5 to 2.7. The streak is white to pale (varies). It breaks with uneven to conchoidal fracture.
Mossy green rhyolite crowded with round spherulites and orb rings in cream, rust, and brown, sometimes with small drusy quartz pockets.
It reaches buyers as tumbled, spheres, cabochons or slabs.
The origins.
Mount Hay, near Rockhampton, Queensland, Australia.
On value, the database notes: affordable and abundant.
Traditional associations.
In energy work traditions, associated with renewal, vitality, and reconnecting with the natural world.
We keep this section because people ask. It sits below the geology on purpose, and none of it describes something the stone does.
Spotting the real thing.
Mossy green rhyolite crowded with round spherulites and orb rings in cream, rust, and brown, sometimes with small drusy quartz pockets.
Honest stone with a misleading trade name: it is rhyolite, not true jasper.
| Looks like | How to tell them apart |
|---|---|
| Ocean jasper | Ocean jasper is true chalcedony with crisp concentric orbs; rainforest rhyolite orbs are fuzzier feldspar spherulites in a granular rock |
| Kambaba jasper | Kambaba shows dark green rounds with black centers (stromatolitic look); rainforest jasper is lighter mossy green with rusty accents |
| Unakite | Unakite is pink orthoclase plus green epidote granules, no spherulite rings |
At-home tests.
Before anyone talks you into a lab report, these are the checks worth doing yourself on rainforest jasper.
| Test | What you should see |
|---|---|
| Scratch check | Hardness varies across spherulites, polish often shows relief |
| Under a loupe | Orbs are radiating fibrous spherulites under a loupe |
| Acid check | No fizz with vinegar |
Anything that scratches, burns or dissolves the piece is a lab job. Get it appraised rather than testing it apart.
Care & handling.
At 6 to 7 on the Mohs scale it handles careful wear but scratches against quartz and dust. Store it separately and take rings off before rough work.
It breaks with uneven to conchoidal fracture, which is worth knowing before you set it or drop it.
Warm water and a soft cloth clean almost everything. Ultrasonic tanks, steamers and household cleaners are where pieces get ruined.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is Rhyolite: quartz, feldspar, glass with spherulites. Crystal system: Not applicable (rock). Specific gravity: 2.5 to 2.7. Streak: White to pale (varies). Cleavage and fracture: Uneven to conchoidal fracture.
How it reaches the market
Mount Hay, near Rockhampton, Queensland, Australia.
What it gets confused with
Ocean jasper: Ocean jasper is true chalcedony with crisp concentric orbs; rainforest rhyolite orbs are fuzzier feldspar spherulites in a granular rock. Kambaba jasper: Kambaba shows dark green rounds with black centers (stromatolitic look); rainforest jasper is lighter mossy green with rusty accents. Unakite: Unakite is pink orthoclase plus green epidote granules, no spherulite rings.
What it is worth
Affordable and abundant.
Where buyers get caught
Honest stone with a misleading trade name: it is rhyolite, not true jasper.
One more thing
Sold by the tonne as 'rainforest jasper', the stone is really a 120-million-year-old devitrified lava, each orb is a starburst of feldspar fibers that grew in cooling glass.
An education-first guide.
No product links here. We do not sell rainforest jasper, and a guide that only covers our own shelves would not be much of a guide.
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