Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral, Often A Rock Given Its Aggregate Nature
Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.
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Schist
Mica Schist (Medium-grade Metamorphic Rock)
Metamorphic
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
sedimentary
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Shale
Shale
sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz variety
sedimentary
Travertine (Tufa)
Chemical Sedimentary Limestone (CaCO3)
sedimentary
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Shale
Shale (clay-sized silicate minerals)
sedimentary
Conglomerate
Conglomerate
Sedimentary Rock
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Banded Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Basalt River Pebble
Aphanitic Mafic Igneous Rock
igneous
Quartz (River Pebble)
Quartz (Silicon Dioxide - SiO2)
mineral
Blue Dyed Agate Geode
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Yellow Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Limestone Pebble
Sedimentary Rock (Calcite, CaCO3)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)
Sedimentary Rock
Sandstone
Sandstone (SiO2 dominant)
sedimentary
Dendrite (Manganese Oxide Dendrites)
Psilomelane or Pyrolusite on Matrix (typically MnO2)
mineral
Basalt
Basalt
Igneous
Agate (Dyed) or composite stone
SiO2
mineral
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Jasper Pendant
Chalcedony (Quartz) - SiO2
Mineral/Sedimentary
Sandstone
Sandstone (SiO2-rich clastic sedimentary rock)
sedimentary
Greenschist with Quartz Veining
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
metamorphic
Wishing Stone with Quartz Vein
Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)
metamorphic
Travertine
Travertine (CaCO3 - Calcium Carbonate)
sedimentary
Copper slag or vesicular basalt with copper minerals
Industrial slag / Basaltic matrix with secondary copper minerals
igneous
Volcanic Tuff (Breccia)
Pyroclastic Tuffaceous Rock
igneous
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Mineral (variety of Chalcedony)
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Calcareous Sandstone)
Calcareous Sandstone (primarily SiO2 with CaCO3 cement)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
Mineral-based Sedimentary/Silica
Picture Jasper
Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary