Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Category
Browse sedimentary (chemically precipitated) specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Aragonite (Flos Ferri)
Calcium Carbonate (CaCO3)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Nodular Chert)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
Jasper in Basalt Matrix
Silicon Dioxide (SiO2) with impurities; Chalcedony
Chert (with small quartz inclusion)
Microcrystalline Silica (SiO2)
Sandstone
Arenite (SiO2 based)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Chert / Flint
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
Chert (specifically Pink/Tan Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
Gold
Native Gold (Au)
Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
Conglomerate
Conglomerate (a clastic sedimentary rock)
Quartzite with Iron Banding
Metamorphosed Quartz-rich Sandstone (SiO2 with Fe2O3 inclusions)
Chert (containing Calcite or Quartz inclusions)
Silicon Dioxide (SiO2) with varying mineral impurities
Banded Chert (River Stone)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Satin Spar (Gypsum)
Hydrous Calcium Sulfate (CaSO4·2H2O)
Chert (specifically Flint or Jasper variant)
Cryptocrystalline Quartz (SiO2)
Carnelian
Carnelian (SiO2 variant)
Chalcedony (Common Opal variant or Chert/Flint)
Silicon Dioxide (SiO2)
Green Calcite
Calcium Carbonate (CaCO3)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Banded Iron Formation
Banded Iron Formation (BIF)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Chert / Flint
Silicon Dioxide (SiO2)
Celestite (Celestine)
Strontium sulfate (SrSO4)
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
Geode (unopened nodule)
Silicon Dioxide (SiO2) Nodule
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Celestine (or Celestite)
Strontium sulfate (SrSO4)
Celestine (Celestite)
Strontium Sulfate (SrSO4)
Celestite (Celestine)
Strontium sulfate (SrSO4)
Chert (Jasper variety)
Microcrystalline quartz (SiO2)
Chert / River Pebble
Silicon Dioxide (SiO2)
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Chert (and Flint)
Silicon Dioxide (SiO2)