Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral
Category
Synthetic (Ceramic)
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Red Quartzite
Quartzite (primarily SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Flint / Chert
Silicon dioxide (SiO2)
sedimentary
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Chert (specifically Flint or Common Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pegmatite
Granitic Pegmatite
igneous
Chert (variations include Flint or Jasper)
Chert (Silicon Dioxide, SiO2)
sedimentary
Flint
Chert (SiO2)
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Likely weathered quartz-bearing rock fragment
Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite
mineral
Chert / Flint
Silicon dioxide (SiO2)
sedimentary
Flint / Chert
Microcrystalline quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (mostly SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral
Chert (Flint variety)
Silicon dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Blue Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
River Quartzite (Water-worn Quartzite)
Quartzite (primarily SiO2)
metamorphic
Chert (Flint/Jasper)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Milky quartz (likely quartz-rich vein fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled milky quartz
Quartz, SiO₂
mineral
Quartz Mix and Feldspar Group
Silicon Dioxide (SiO2) and Potassium Alumino-silicates (KAlSi3O8)
mineral
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Tan)
Silicon Dioxide (SiO2)
mineral