Jasper
Silicon dioxide (SiO2)
mineral
Category
Not A Rock
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Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Yellow Quartzite (River Pebble)
Quartzite (SiO2)
metamorphic
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Sandstone Cobble with Iron Staining
Arenite with Limonite/Hematite staining
sedimentary
Red Sandstone
Arenite (Iron-rich)
sedimentary
Geode (Quartz / Chalcedony Geode)
SiO2 (Silicon Dioxide)
sedimentary
Unidentified Rock Fragment
Unknown
Rock
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Sandstone
Clastic sedimentary rock (Quartz arenite or arkose)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Calcite (or Travertine / Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Diorite
Intermediate plutonic igneous rock
igneous
Granite
Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Limestone
Calcium carbonate (CaCO3)
sedimentary
Quartzite
Metamorphic Quartz Arenite
metamorphic
Quartz (or Chert/Flint)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Granite
Granite (Intrusive Igneous Rock)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Flint / Chert (or fossiliferous nodule)
Microcrystalline quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Igneous
Red Jasper (Beach Pebble)
SiO2 (Microcrystalline Quartz with Hematite inclusions)
sedimentary