Rock Identifier

Category

Sedimentary (Microcrystalline Silicate)

Browse sedimentary (microcrystalline silicate) specimens identified by the Rock Identifier community.

Native Sulfur (Sulfur (S8)) — mineral

Native Sulfur

Sulfur (S8)

Calcite (or Alabaster, if truly carved) (Calcium Carbonate (CaCO3)) — Mineral/Rock

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Micro-crystalline Quartz Pebble (Chert) (Silicon dioxide (SiO2)) — sedimentary

Micro-crystalline Quartz Pebble (Chert)

Silicon dioxide (SiO2)

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)

Banded Agate (Gray Agate) (Silicon Dioxide (SiO2) - Chalcedony) — mineral

Banded Agate (Gray Agate)

Silicon Dioxide (SiO2) - Chalcedony

Sandstone (Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Pebble)

Arenite (primarily SiO2)

Agate (specifically Botswana or Lake Superior style chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (specifically Botswana or Lake Superior style chalcedony)

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (SiO2) - variety Chalcedony) — mineral

Agate

Silicon dioxide (SiO2) - variety Chalcedony

Banded Agate (Silicon Dioxide (SiO2)) — mineral

Banded Agate

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Agate (White Agate) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Banded Agate (White Agate)

Chalcedony (Silicon Dioxide, SiO2)

Agate (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Agate

Silicon Dioxide (SiO2) - Banded Chalcedony

Banded Agate (Chalcedony / Silicon Dioxide (SiO2)) — mineral

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Banded Agate (Silicon Dioxide (SiO2) - variety Chalcedony) — mineral

Banded Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Sandstone (Greywacke/Lithic Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Moss Agate (Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Agate (Polished Nodule) (Agate (Silicon Dioxide, SiO2)) — mineral

Agate (Polished Nodule)

Agate (Silicon Dioxide, SiO2)

Agate (specifically Botswana or Lake Superior style Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (specifically Botswana or Lake Superior style Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Moss Agate (Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions) — mineral

Moss Agate

Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

Sandstone Concretion (Sandstone (Sedimentary Rock) with silica or calcite cement) — sedimentary

Sandstone Concretion

Sandstone (Sedimentary Rock) with silica or calcite cement

Banded Agate (specifically Carnelian Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate (specifically Carnelian Agate)

Cryptocrystalline Quartz (SiO2)

Banded Agate (Yellow Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Yellow Agate)

Silicon Dioxide (SiO2)

Sandstone (likely with Borings or Vesicular Basalt) (Clastic Sedimentary Rock (Sandstone)) — sedimentary

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

Agate (Banded Chalcedony (SiO2)) — mineral

Agate

Banded Chalcedony (SiO2)

Agate (Chalcedony Variation) (Silicon Dioxide (SiO2)) — mineral

Agate (Chalcedony Variation)

Silicon Dioxide (SiO2)

Banded Agate (specifically Lace Agate type) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (specifically Lace Agate type)

Silicon Dioxide (SiO2)

Grey Agate (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Grey Agate (Tumbled)

Silicon Dioxide (SiO2)

Dyed Agate Slice (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Dyed Agate Slice

Silicon Dioxide (SiO2) - variety of Chalcedony

Vesicular Basalt with Quartz/Chalcedony (Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)) — igneous

Vesicular Basalt with Quartz/Chalcedony

Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)

Blue Lace Agate (Silicon Dioxide (SiO2)) — mineral

Blue Lace Agate

Silicon Dioxide (SiO2)

Red Agate (Carnelian) (Chalcedony (SiO2) with iron oxide inclusions) — mineral

Red Agate (Carnelian)

Chalcedony (SiO2) with iron oxide inclusions

Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Mookaite Jasper (Silicified Radiolarite (SiO2)) — sedimentary

Mookaite Jasper

Silicified Radiolarite (SiO2)

Banded Agate (Brazilian Agate Slice) (Chalcedony (Silicon Dioxide / SiO2)) — Mineral

Banded Agate (Brazilian Agate Slice)

Chalcedony (Silicon Dioxide / SiO2)

Agate (Sliced Nodule) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Agate (Sliced Nodule)

Silicon Dioxide (SiO2) - Chalcedony variety

Sandstone (with Iron Staining) (Clastic sedimentary rock (High Silica / Iron Oxide)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (High Silica / Iron Oxide)

Agate (Chalcedony) (Agate (Silicon Dioxide - SiO2)) — mineral

Agate (Chalcedony)

Agate (Silicon Dioxide - SiO2)

River Stone (likely Quartzite or Chert) (Recrystallized Silicon Dioxide (SiO2)) — metamorphic

River Stone (likely Quartzite or Chert)

Recrystallized Silicon Dioxide (SiO2)