Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Or Mineraloid If Microcrystalline)
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Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Red Jasper and Hematite
Silicon Dioxide (SiO2) and Iron Oxide (Fe2O3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Plume Agate
Cryptocrystalline Quartz (SiO2)
Mineral/Gemstone
Polished jasper pebble (possibly orbicular jasper)
Microcrystalline quartz (SiO₂), likely jasper; exact variety cannot be confirmed visually
igneous
Chalcedony on Ironstone
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeOOH)
sedimentary
Dalmatian Jasper
Feldspar porphyry (Microcline and Quartz with Arfvedsonite spots)
igneous
Chert (likely chalcedony-rich flint)
Microcrystalline quartz, SiO₂ (quartz/chalcedony)
sedimentary
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Jasper / Chert (river tumbled)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Quartz (or Chalcedony) Specimen
Silicon Dioxide (SiO2)
mineral
Red jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz, SiO₂, colored mainly by iron oxides
mineral
Brecciated jasper (likely ocean jasper or red jasper)
Microcrystalline quartz, SiO₂, with iron-oxide pigments and breccia cement
mineral
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled brown jasper
Microcrystalline quartz/chalcedony (SiO₂), commonly iron-stained
mineral
Polished jasper slab
Jasper, an opaque microcrystalline variety of chalcedony (SiO₂), colored mainly by iron oxides
mineral
Tumbled red jasper
Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides
mineral
Polished red jasper pebble
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
mineral
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian jasper (likely orbicular rhyolite)
Silica-rich rhyolite, commonly sold as Dalmatian jasper; typically quartz, feldspar, and dark amphibole/biotite inclusions
igneous
Quartz / Chert
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Bumblebee Jasper
Carbonate-rich volcanic rock containing Sulfur and Arsenic (Realgar/Orpiment)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled reddish-brown stone, likely jasper
Jasper (microcrystalline quartz, SiO₂), possibly red jasper or jasper-rich chert
mineral
Jasper
Microcrystalline Quartz (SiO2)
mineral
Fossilized Echinoid (Sea Urchin) or Brachiopod
Echinoidea / Invertebrate Fossil
fossil
Jasper (likely Brecciated or Multi-colored)
Jasper (SiO2)
sedimentary
Jasper and Mixed River Pebbles
Microcrystalline Quartz (Chalcedony / Jasper)
sedimentary
Quartz with Epidote / Serpentine (Vein Quartz)
SiO2 (Quartz) with Ca2(Al,Fe)3(SiO4)3(OH) (Epidote)
metamorphic
Agate
SiO2
mineral
Tumbled dark mineral on a polished brown stone slab
Likely quartz-rich chalcedony or jasper slab with a dark metallic mineral inclusion; exact identification is uncertain from the photograph
mineral