Cave Creek Jasper
Silicon dioxide (SiO2) with iron oxide impurities
An opaque jasper from the Cave Creek area of Arizona, prized for earthy mottled and banded patterns in warm desert tones.
- Mohs hardness
- 6.5-7
- Color
- earthy reds, browns, tan, cream, and grey with mottled or banded patterns
- Type
- mineral
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Overview
Cave Creek Jasper is a locality-named variety of jasper found in the Cave Creek region of Arizona. Like all jasper it is an opaque microcrystalline quartz, colored by iron oxides into warm desert tones of red, brown, tan, cream, and grey, often with mottled, swirled, or banded patterning.
The stone is valued by rockhounds and lapidaries for its earthy palette and the variety of patterns found within a single deposit. It is collected from the volcanic terrain of central Arizona.
As with many regional jaspers, the name reflects its source rather than a distinct mineralogy.
Formation & geology
Cave Creek Jasper formed in the volcanic landscape of central Arizona, where silica-rich fluids filled fractures, cavities, and porous host rock and precipitated as dense fine-grained quartz. Iron and manganese oxides carried by these fluids produced the warm reds, browns, and tans.
The mottling and banding record fluctuating chemistry and flow during deposition within rhyolitic and other volcanic rocks. Weathering and erosion later freed the jasper, which is collected from washes, hillsides, and outcrops in the Cave Creek area.
How to identify it
Identify Cave Creek Jasper by its opaque body, hardness near 6.5-7 (scratches glass and steel), white streak, and warm earthy coloration with mottled or banded patterns.
It has a dull luster when rough and a waxy to glassy polish, with conchoidal to splintery fracture. Its desert reds and browns help link it to the Arizona source.
Distinguish it from local agates (translucent, banded) and from rhyolite (visibly grainy with crystals). The dense, opaque, glass-scratching quartz texture confirms jasper.
Uses & significance
Cave Creek Jasper is used mainly for lapidary work, cut into cabochons, tumbled stones, beads, and slabs that showcase its desert patterning. It is hard and takes a good polish, making it suitable for pendants and rings.
It is popular among Arizona rockhounds as a regional collecting find and is used in handmade Southwestern-style jewelry.
Metaphysically jasper is regarded as a grounding, stabilizing stone, though such properties are not scientifically supported.
Frequently asked questions
Where does Cave Creek Jasper come from?
It is collected from the Cave Creek area of central Arizona, a volcanic terrain rich in silica deposits.
Is Cave Creek Jasper a distinct mineral?
No. It is ordinary jasper (microcrystalline quartz) named for its locality rather than a unique mineral composition.
What colors is it?
It shows earthy desert tones of red, brown, tan, cream, and grey, often mottled or banded.
Can you find Cave Creek Jasper by rockhounding?
Yes. It is collected from washes, hillsides, and outcrops in the Cave Creek region, weathered out of volcanic host rock.
Cave Creek Jasper guides
In-depth guides for identifying, valuing, and understanding Cave Creek Jasper.
