Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Chemical)
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Grey Quartz Variant)
Silicon Dioxide (SiO2)
mineral
Quartz (Clear or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Brown/Dark variety)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Vesicular Basalt with Pyrite
Basalt (MgFe2+)(Si,Al)2O6 containing FeS2 inclusions
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Vein and Weathering Crust
Amygdaloidal or Porphyritic Basalt
igneous
Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Rhyolite
Rhyolite (felsic extrusive igneous rock)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (with Iron Staining)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Diorite (Salt and Pepper Rock)
Diorite
igneous
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartz (Crystal Fragment)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granodiorite
Granodiorite (Phaneritic intrusive igneous rock containing Plagioclase, Quartz, and Biotite/Amphibole)
igneous
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Quartzite with Schist Inclusions
Metamorphosed Quartzite (SiO2) with minor mica/chlorite schist
metamorphic
Gold
Gold (Au)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Diabase (Dolerite) Cobble
Diabase / Dolerite
igneous
Howlite
Hydrous calcium borosilicate (Ca2B5SiO9(OH)5)
mineral
Quartzite with Glauconitic or Iron staining
Quartzite (SiO2 with accessory minerals)
metamorphic
Obsidian
Volcanic Glass (SiO2 dominant)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic