sedimentary

Turtle Jasper

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5-7 on the Mohs scale, featuring distinct crackled or webbed patterns resembling turtle shell segments in white, brown, and tan. It has a vitreous to dull luster and cryptocrystalline structure.

Identified October 25, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the silification of sedimentary rock or mud, where silica-rich groundwater fills fractures and cements broken fragments together over millions of years.

Uses & applications

Primarily cut and polished into cabochons for jewelry, carved into decorative objects, and collected by rockhounds.

Geological facts

The unique webbed appearance, known as brecciation, is caused by rock fracturing underground followed by mineral infilling.

Field identification & locations

Identified by its contrasting polygonal patterns and smooth, tumbled texture. Commonly sourced from arid regions such as western United States and Madagascar.