Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Category
Glass
Browse glass specimens identified by the Rock Identifier community.
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Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Yellow/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky Variety)
Silicon Dioxide (SiO2)
mineral
Quartz Mineral
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
gemstone
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Milky Quartz with Mica inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz (Stained with Iron)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (White/Milky)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Cloudy Quartz (or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Amorphous volcanic glass (principally SiO2)
igneous
Quartz pebble
Silicon dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Red Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Chert (Quartz Variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Green Quartzite
Metamorphic Quartz (SiO2) with Chromium-rich inclusions (Fuchsite)
metamorphic
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Igneous/Metamorphic Hybrid
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (mainly Silicon Dioxide, SiO2)
metamorphic