16.6.1.6: Jasper

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May 6, 2022
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- 16.6.1.5: Chrysoprase
- 16.6.1.7: Onyx

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Gemology Project

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Jasper
Chemical composition	SiO₂ Silicon dioxide
Crystal system	Trigonal
Habit	Aggregate, massive
Fracture	Conchoidal
Hardness	6.5-7
Refractive index	1.53-1.54
Specific gravity	2.58-2.64
Lustre	Vitreous

Figure $\PageIndex{1}$ : Imperial Jasper Cabochon, Mexico
Photo courtesy of Rick Martin

Scenic Jasper

Picture, or scenic, or landscape jasper and agate gets its name from the pictures of scenes, animals or objects formed by the colorful patterns from other minerals present.

Poppy Jasper

"Poppy Jaspers" are jaspers showing red orbicular patterns resembling poppies, hence the name. The best varieties come from Northern California, close to the S. Andreas Fault system (Morgan Hill and Guadalupe).

Guadalupe Poppy Jasper, California

File:Jsp0003.JPG

Figure $\PageIndex{1}$ : Guadalupe poppy jasper cab.

File:Jsp0002.JPG

Figure $\PageIndex{2}$ : Guadalupe poppy jasper cab.

Figure $\PageIndex{3}$ : Guadalupe poppy jasper slab.

Morgan Hill Poppy Jasper, California

File:Mhpj2.JPG

Figure $\PageIndex{4}$ : Morgan Hill poppy jasper cab.

Figure $\PageIndex{5}$ : Morgan Hill poppy jasper. Details of the orbicular structures.

Figure $\PageIndex{6}$ : Morgan Hill poppy jasper slab.

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Scenic Jasper

Poppy Jasper

Guadalupe Poppy Jasper, California

Morgan Hill Poppy Jasper, California

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