Light Blue Quartzite Pebbles / Decorative Stone
Metamorphic Quartzite (SiO2)
metamorphic
Category
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Chert (Flint)
Chert (SiO2)
sedimentary
Chert / River Cobble
Microcrystalline Quartz (SiO2)
sedimentary
Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gold Flakes (Placer Gold)
Gold (Au)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz (Druzy or Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gold Nugget
Native Gold (Au)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or limonite inclusions
sedimentary
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Quartz Pebbles
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Tiger's Eye (Gold/Brown variety)
Silicon dioxide (SiO2) with fibrous crocidolite inclusions
metamorphic
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Yellow Sapphire
Corundum (Al2O3) with iron impurities
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (often called Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint Pebble)
Silicon Dioxide (SiO2)
sedimentary
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite (Iron-Stained)
Quartzite (primarily SiO2 with iron oxide impurities)
metamorphic
Chert (Jasper/Agate variant)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Grey Basalt Pebble
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral