Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Category
Man Made Glass
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Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Rose Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Wishing Stone (Basalt or Chert with Quartz Veins)
Basalt or microcrystalline Quartz (Chert) with localized hydrothermal Quartz (SiO2) veining
igneous or sedimentary
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Quartz Pebble
Silica (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (70% or more silicon dioxide)
Igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Faceted Diamond / Moissanite / Cubic Zirconia
Carbon (C) if Diamond, Silicon Carbide (SiC) if Moissanite
gemstone
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Peridot (Gem-quality Olivine)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
Mineral
Quartzite pebble
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite with Iron Inclusions
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (Rose Quartz or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Granular)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Crystal (Amethyst)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
sedimentary