Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Quartz Pebble (Grit)
Silicon Dioxide (SiO2)
mineral
Fossilized Solitary Rugose Coral (Horn Coral)
Order: Rugosa (e.g., Grewingkia or Heliophyllum); composed of Calcite (CaCO3) or Silica (SiO2)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
mineral
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Diabase (also known as Dolerite)
Diabase
igneous
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Agate Nodule (partially vuggy Quartz)
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Ruby (Raw Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Jasper (Green Jasper/River Stone)
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Dalmatian Stone
Peralkaline igneous rock containing quartz, feldspar, and arfvedsonite
igneous
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Chert (River Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Jasper
Quartz (SiO2) with impurities
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Quartzite with inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline silicon dioxide, SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in a Secondary Sedimentary/Volcanic cavity
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Agate
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
mineral
Milky or Iron-Stained Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary
River Stone (Chalcedony/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Native Gold (in Jewelry)
Gold (Au)
mineral
Sandstone Clast
Arenite (primarily SiO2)
sedimentary
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Amber Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble (Citrine-colored or Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Vein and Weathering Crust
Amygdaloidal or Porphyritic Basalt
igneous
Pink Dyed Agate (Pink Agate Slice)
Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz
mineral
Hematite (Botryoidal)
Hematite (Fe2O3)
mineral