Rogue River Jasper
Silicon dioxide (SiO2), microcrystalline quartz
An Oregon picture jasper from the Rogue River area showing earthy scenic patterns in tan, brown, gold, and cream.
- Mohs hardness
- 6.5-7
- Color
- Tan, brown, cream, gold, and gray scenic tones
- Type
- mineral
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Overview
Rogue River Jasper is a picture jasper found in the Rogue River region of southwestern Oregon, USA. It shows warm earthy scenic patterns, tans, browns, golds, creams, and grays, that often resemble desert and canyon landscapes.
Like all jasper it is opaque microcrystalline quartz colored by iron oxides. River-tumbled and bedrock material alike are collected by rockhounds, and quality slabs that read as miniature scenery are popular among lapidaries and collectors.
Formation & geology
Rogue River Jasper formed in the volcanic and sedimentary terrain of southwestern Oregon, where silica-rich groundwater precipitated as dense microcrystalline quartz within ash, sediment, or fractured rock. Iron oxides introduced during deposition produced its warm tan, brown, and gold tones.
Layered deposition and oxide migration created the scenic banding, and in some pieces dendritic manganese adds tree-like detail. Material eroded from these deposits is transported and rounded by the Rogue River, where rockhounds collect tumbled cobbles alongside in-place outcrops.
How to identify it
Look for an opaque jasper with warm earth-toned scenic banding in tan, brown, gold, cream, and gray.
- Hardness: 6.5-7; scratches glass.
- Luster: dull to waxy raw, vitreous polished.
- Streak: white.
- Look-alikes: Biggs and Deschutes jaspers are similar Oregon pictures; Rogue River tends toward warm golden-brown tones. River-tumbled pieces show smooth rounded surfaces. Provenance and palette help separate the related Oregon scenic jaspers.
Uses & significance
Rogue River Jasper is a lapidary and collector stone, slabbed for natural-art display and cut into cabochons and pendants that showcase its scenery. Rockhounds also collect tumbled river specimens directly.
At near 7 Mohs it polishes well and is durable in jewelry. As a picture jasper it carries metaphysical associations with grounding and stability, beliefs that are spiritual rather than scientifically established.
Frequently asked questions
Where is Rogue River jasper found?
It comes from the Rogue River region of southwestern Oregon, USA, both as bedrock material and river-tumbled cobbles.
What does Rogue River jasper look like?
It shows warm earthy scenic patterns in tan, brown, gold, cream, and gray that often resemble desert and canyon landscapes.
Is Rogue River jasper the same as Biggs jasper?
Both are Oregon picture jaspers and look similar, but they come from different localities; Rogue River tends toward warmer golden-brown tones.
Can I collect Rogue River jasper myself?
Rockhounds collect it along the Rogue River and nearby outcrops, subject to local land and collecting regulations.
Rogue River Jasper guides
In-depth guides for identifying, valuing, and understanding Rogue River Jasper.
Rogue River Jasper identified by the community
Real specimens identified with Rock Identifier.
