Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Synthetic Glass
Browse synthetic glass specimens identified by the Rock Identifier community.
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Metamorphic Rock (rich in SiO2)
metamorphic
Quartzite River Stone
Quartzite (SiO2)
metamorphic
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Quartzite Pebble
SiO2 (Silicon Dioxide)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Common Opal blend)
Microcrystalline Quartz (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite pebble
Quartzite (principally SiO2)
metamorphic
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite (River Stone)
Quartzite (SiO2)
metamorphic
Agate
SiO2
Mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Agate (or Quartz with Agate banding)
Silicon dioxide (SiO2)
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper
Cryptocrystalline quartz (SiO2)
Sedimentary/Mineral
Quartz, Sandstone, and Siltstone specimens
Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks
mineral and sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Yellow/Tan Quartzite Pebble)
Silicon Dioxide (SiO2)
metamorphic
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Polished black stone, likely obsidian
Volcanic glass; predominantly silica-rich rhyolitic glass (SiO₂), identification uncertain from the image
igneous
River Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
SiO2 (Metamorphosed Sandstone)
metamorphic
Chert (variations include Flint or Jasper)
Chert (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite or Magnetite inclusions)
igneous