Willow Creek Jasper
Silicon dioxide (SiO2) with clay and iron impurities
A prized Idaho jasper known for porcelain-smooth pastel pinks, creams, and greens in soft swirling, orbicular patterns.
- Mohs hardness
- 6.5-7
- Color
- Soft pastel pinks, creams, peach, grey, and pale green
- Type
- mineral
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Overview
Willow Creek Jasper is a highly regarded jasper from Idaho, USA, famed for its soft, porcelain-like pastel coloration in pinks, creams, peach, grey, and pale green. It is sometimes called "Eagle Rock Plume Jasper" after a nearby locality.
The stone is prized by lapidaries for its smooth, dense texture that takes an exceptionally fine polish, and for its gentle gradients and occasional orbicular (egg-shaped) patterns. Fine-quality material is collector-grade and increasingly scarce.
It is an opaque microcrystalline quartz, colored more by clay minerals than the heavy iron staining seen in red jaspers, which gives it its delicate palette.
Formation & geology
Willow Creek Jasper formed in volcanic ash and rhyolitic host rock where silica-rich fluids slowly replaced and filled the matrix. The pastel coloration comes from finely dispersed clay minerals and low concentrations of iron, rather than the dense iron oxides that produce vivid reds.
Orbicular patterns developed as silica precipitated radially around nucleation points. The deposit is located in the Willow Creek area near Eagle, Idaho, where it is hand-dug from limited claims, contributing to its scarcity and value.
How to identify it
Identify Willow Creek Jasper by its very smooth, porcelain-like surface and soft pastel pinks, creams, and greens, often with subtle swirls or round orbs. Hardness is 6.5-7, scratching glass; streak is white.
Its dense, fine grain and matte-to-glassy polish help separate it from coarser jaspers. Look-alikes include other pastel picture jaspers and porcelain jasper, but the Idaho origin and characteristic pink-cream-green palette are diagnostic. It is fully opaque, unlike chalcedony or agate.
Uses & significance
Willow Creek Jasper is cut into cabochons, beads, and collector slabs, valued for its soft colors that suit elegant, understated jewelry. Top-grade orbicular material is prized by collectors and can command premium prices.
Metaphysically it is described as a calming, nurturing stone. Its real worth lies in its rarity, fine polish, and gentle, distinctive coloration that few other jaspers match.
Frequently asked questions
Where is Willow Creek Jasper found?
It is mined near Eagle, Idaho, USA, in the Willow Creek area; it is also called Eagle Rock Plume Jasper.
Why is Willow Creek Jasper valuable?
Its soft pastel colors, porcelain-smooth texture, fine polish, and limited supply make quality pieces collector-grade.
What gives Willow Creek Jasper its pastel colors?
Finely dispersed clay minerals and low iron content, rather than heavy iron oxide staining.
Is Willow Creek Jasper the same as porcelain jasper?
It shares the smooth porcelain-like texture and is sometimes marketed that way, but it specifically refers to the Idaho deposit.
Willow Creek Jasper guides
In-depth guides for identifying, valuing, and understanding Willow Creek Jasper.
Willow Creek Jasper identified by the community
Real specimens identified with Rock Identifier.
