Milky Quartz with Epidote or Chlorite inclusions
Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Category
Man Made Glass
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Basalt
Basalt (Extrusive volcanic rock)
igneous
Rose Quartz
Silicon dioxide (SiO2)
mineral
Chert (specifically a fragment with Desert Varnish)
Microcrystalline quartz (SiO2)
sedimentary
Quartz (or Chert/Flint)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2 dominant)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite
SiO2 (Silicon Dioxide)
metamorphic
Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
sedimentary
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Chert (with Patina)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Pyrite and Iron Staining
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2) inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
mineral
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Microcrystalline Limestone
Limestone (CaCO3 with impurities)
sedimentary
Sandstone with Ironstone Concretion
Arenite with Ferruginous Cement
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (likely Quartzose)
Arenite
sedimentary
Sandstone (Arkose/Quartzose)
Arenite (SiO2 based clastic rock)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxides)
sedimentary