metamorphic
Quartz-bearing reddish metamorphic rock, possibly ferruginous quartzite or jasper vein
Quartz (SiO₂) with iron oxides; likely quartzite or iron-rich jasper
AI-generated identification · may be incorrectHardness about 6.5–7; gray-white granular quartz with a reddish-brown, earthy to submetallic iron-oxide zone. Massive, nonfoliated texture, no obvious cleavage, and moderate-to-high density; the image alone cannot distinguish quartzite from jasper confidently.
Identified More metamorphic →
Explore Quartz-bearing reddish metamorphic rock, possibly ferruginous quartzite or jasper vein in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness about 6.5–7; gray-white granular quartz with a reddish-brown, earthy to submetallic iron-oxide zone. Massive, nonfoliated texture, no obvious cleavage, and moderate-to-high density; the image alone cannot distinguish quartzite from jasper confidently.
Formation & geological history
Likely formed when silica-rich rock was metamorphosed or cemented, with later iron-oxide staining or replacement. The age is indeterminate without locality and laboratory analysis.
Uses & applications
Used mainly as a collector specimen, lapidary rough, or decorative stone; quartzite can serve as aggregate and building stone, while jasper is used for cabochons and ornaments.
Geological facts
The white-gray portion appears quartz-rich, while the red-brown color commonly comes from hematite or limonite. A steel file should barely scratch it, whereas glass can be scratched by fresh quartz surfaces.
Field identification & locations
Look for abundant interlocking quartz grains, conchoidal fracture, and red iron staining; test with a streak plate, hardness pick, and acid (no fizz expected). Common in iron-rich metamorphic or hydrothermal terrains worldwide.
More like this
