Feldspar Pegmatite
Pegmatitic Potassium Feldspar (KAlSi3O8) with Quartz and Mica
igneous
Category
Synthetic (Ceramic)
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Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Iron-rich)
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Orthoclase (Potassium) Feldspar in Quartz
KAlSi3O8 (Potassium Aluminum Silicate)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Yellow Quartzite Pebble
Quartzite (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Shale
Argillaceous Sedimentary Rock
sedimentary
Quartz / Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Chert / Flint Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Limonite with Hematite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Chert (Flint variety)
Chert (SiO2)
sedimentary
Pegmatite
Igneous Pegmatite (Quartz-Feldspar-Biotite)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (variations include Flint)
Silicon Dioxide (SiO2)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral