Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Category
Minerals
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Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Chert (Jasper variation)
Silicon dioxide (SiO2)
sedimentary
Mica Schist with Garnet
Garnet-Mica Schist
metamorphic
Tiger Iron / Banded Iron Formation
Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Double-Terminated)
Silicon Dioxide (SiO2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Graphite
Graphite (C)
mineral
Banded Calcite
Calcium Carbonate (CaCO3)
mineral
Chert Nodules
Microcrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Greenschist
Greenschist facies metamorphic rock
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Greenschist
Chlorite schist
metamorphic
Chert Breccia
Brecciated Chert (Microcrystalline Silica, SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Mudstone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Garnet Schist
Almandine-Mica Schist
metamorphic
Graywacke
Lithic Sandstone (Graywacke)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Microcrystalline variety)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist (Medium-grade metamorphic rock)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Jadeite (Jade)
Jadeite, NaAlSi2O6
metamorphic
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of cellulose)
sedimentary
Green Slate (Greenstone)
Metamorphic shale (varied composition)
metamorphic
Natural White Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin - CaCO3
mineraloid
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral
Turquoise (Blue Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary