Potassium Feldspar
K-Feldspar (Orthoclase/Microcline) KAlSi3O8
mineral
Category
Synthetic (Ceramic)
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Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz (Raw Crystal)
Silicon Dioxide (SiO2)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
mineral
Shale
Shale (clastic sedimentary rock composed of silt and clay-sized particles)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Flint
Silicon dioxide (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Flint nodules in Limestone)
Silicon dioxide (SiO2)
sedimentary
Flint
Chert (SiO2)
sedimentary
Shale with Trace Fossils
Fissile mudrock (Shale)
sedimentary
Milky quartz-rich vein rock
Quartz, SiO₂, likely massive or microcrystalline quartz
mineral
Flint
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar (likely Orthoclase or Plagioclase)
Tectosilicate Feldspar (KAlSi3O8 to (Ca,Na)(Al,Si)4O8)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Pebble
Quartzite
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Feldspar (Orthoclase/Microcline)
Potassium Feldspar (KAlSi3O8)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral