Rock Identifier
Fossiliferous Red Jasper (Silicified microcrystalline quartz containing marine invertebrate fossils (SiO2)) — fossil
fossil

Fossiliferous Red Jasper

Silicified microcrystalline quartz containing marine invertebrate fossils (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, reddish-brown color due to iron oxide impurities, waxy to vitreous luster, and microcrystalline crystal structure.

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, reddish-brown color due to iron oxide impurities, waxy to vitreous luster, and microcrystalline crystal structure.

Formation & geological history

Formed through the silification and replacement of ancient marine sediments and shell fragments during the Paleozoic era.

Uses & applications

Used in lapidary arts, ornamental carving, and valued by fossil and mineral collectors.

Geological facts

The red matrix preserves ancient marine life details, such as crinoid stem ossicles, perfectly replaced by quartz over millions of years.

Field identification & locations

Identify by its dense red color and visible fossil impressions or cross-sections, commonly found in gravel beds and glacial tills.

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Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image

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