Rock Identifier

Category

Sedimentary (Silica Rich Mineral Variety)

Browse sedimentary (silica rich mineral variety) specimens identified by the Rock Identifier community.

Amethyst (SiO2 (Silicon Dioxide) - Purple variety of Quartz) — mineral

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Quartz

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Banded Agate (Lake Superior Agate type) (Agate (Cryptocrystalline Variety of Quartz, SiO2)) — mineral

Banded Agate (Lake Superior Agate type)

Agate (Cryptocrystalline Variety of Quartz, SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Jasper (Green Jasper/Heliotropic Chert) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Green Jasper/Heliotropic Chert)

Silicon Dioxide (SiO₂)

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Fluorite (Green Fluorite) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite (Green Fluorite)

Fluorite (Calcium Fluoride, CaF2)

Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions (Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)) — igneous/metamorphic

Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions

Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)

igneous/metamorphic

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert / Chalcedony (likely carnelian or flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert / Chalcedony (likely carnelian or flint variety)

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Milky Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz (Tumbled) (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz (Tumbled)

Quartz (Silicon Dioxide, SiO2)

Banded Agate (specifically Eye Agate / Chalcedony) (Agate (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Banded Agate (specifically Eye Agate / Chalcedony)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Fancy Jasper (Silicon dioxide (SiO2)) — sedimentary

Fancy Jasper

Silicon dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert Breccia (Yellow Jasper) (Silicon Dioxide (SiO2) - Brecciated Chert) — sedimentary

Chert Breccia (Yellow Jasper)

Silicon Dioxide (SiO2) - Brecciated Chert

Green Aventurine (Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Amethyst (Amethyst (a variety of Quartz, SiO2)) — Mineral

Amethyst

Amethyst (a variety of Quartz, SiO2)

Quartz Geode (Silicon Dioxide (SiO2) in a concretionary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in a concretionary structure

Quartz (Drusy/Crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Chert (specifically Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (specifically Flint)

Silicon dioxide (SiO2)

Clear Quartz (beads in a bracelet) (Quartz (SiO2)) — Mineral

Clear Quartz (beads in a bracelet)

Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

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

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Chert (with Limestone/Dolomite host) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Limestone/Dolomite host)

Microcrystalline Quartz (SiO2)

Yellow Chert or Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chert or Jasper

Silicon Dioxide (SiO2)

Quartz (Quartzite fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Quartzite fragment)

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Fossilized Turritella Gastropod (Internal Mold) (Turritella (Fossil Gastropod Crust)) — sedimentary

Fossilized Turritella Gastropod (Internal Mold)

Turritella (Fossil Gastropod Crust)

Rose Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Jasper with Dendritic Inclusions (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz (Rock Crystal) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Chert (Gravel / Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Gravel / Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — Mineral

Milky Quartz

Silicon Dioxide (SiO2)