Red Jasper
Jasper (SiO2) with Hematite (Fe2O3) inclusions
sedimentary (microcrystalline quartz)
Category
Sedimentary (Microcrystalline Quartz)
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
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Black Jasper (Black Onyx substitute)
Silicon Dioxide (SiO2) with carbonaceous impurities
sedimentary (microcrystalline quartz)
Yellow Jasper
Chalcedony (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)
Red Jasper (River Pebble)
Silicon Dioxide (SiO2) with hematite impurities
sedimentary (microcrystalline quartz)
Dalmatian jasper (likely orbicular rhyolite)
Silica-rich rhyolite, commonly sold as Dalmatian jasper; typically quartz, feldspar, and dark amphibole/biotite inclusions
igneous
Jasper River Pebble
Silicon Dioxide (SiO2)
sedimentary (microcrystalline quartz)
K2 Jasper (K2 Granite)
Azurite in Granite (Biotite Granite with Azurite inclusions)
igneous
Chert / Flint Arrowheads
Cryptocrystalline Quartz (SiO2)
sedimentary
Dalmatian Stone (commonly called Dalmatian Jasper)
Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)
igneous
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)
igneous
Chert (and Limestone Pebbles)
Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz
sedimentary
Tumbled quartz-rich pebble, possibly chert or jasper
Microcrystalline quartz (SiO₂), likely chert/jasper; exact identification requires testing
sedimentary
Brown Pebble (Probable Chert or Siltstone)
Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz
sedimentary
Melo Melo Pearl (or Golden Chalcedony / Yellow Jasper Sphere)
Non-nacreous calcium carbonate pearl (or SiO2 - Silicon Dioxide)
gemstone
Weathered quartz-rich rock, possibly quartzite or chert
Quartz (SiO₂), likely in a quartzite matrix; exact identification is uncertain from the image
metamorphic
Geode Nodule Fragment
Quartz / Chalcedony Nodule
sedimentary
Red jasper (likely)
Microcrystalline quartz, SiO₂, colored red by iron oxides
mineral
Banded Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert / Quartzite
Silicon Dioxide (SiO2)
sedimentary
Quartzite (or Chert/Flint gravel)
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Chert
Microcrystalline or cryptocrystalline quartz
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Chert / Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert Nodule
Microcrystalline Quartz
sedimentary
Carnelian Agate
Chalcedony (SiO2)
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled Agate
Silicon Dioxide (SiO2)
gemstone
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Common Opal/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper Pebble
SiO2 (Microcrystalline Quartz)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Brown Jasper / Chert
Microcrystalline Quartz (SiO2)
sedimentary
Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Jasper with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary