Rock Identifier

Category

Sedimentary (Formed From Silica Deposits)

Browse sedimentary (formed from silica deposits) specimens identified by the Rock Identifier community.

Sandstone (Quartz-rich) (Arenite (SiO2)) — sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2)

Ferruginous Quartz (River Pebble) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary (secondary classification for a weathered mineral specimen)

Ferruginous Quartz (River Pebble)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

sedimentary (secondary classification for a weathered mineral specimen)

Chert (Flint) (Microcrystalline silica (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline silica (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Pyrite (Pyrite (Iron Disulfide), FeS2) — Mineral

Pyrite

Pyrite (Iron Disulfide), FeS2

Chert (and Limestone) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Limestone)

Silicon Dioxide (SiO2)

Red Jasper (River Stone) (Jasper (Silicon Dioxide, SiO2 plus iron oxide inclusions)) — sedimentary

Red Jasper (River Stone)

Jasper (Silicon Dioxide, SiO2 plus iron oxide inclusions)

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Jasper (Iron-stained Chert) (Silicon Dioxide (SiO2) with impurities of Hematite or Goethite) — sedimentary

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Chert / Flint (with quartz or calcite inclusion) (Silicon dioxide (SiO2)) — sedimentary

Chert / Flint (with quartz or calcite inclusion)

Silicon dioxide (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Black Mountain Stone (Seiryu Stone) (Limestone with Calcite veins (CaCO3)) — sedimentary

Black Mountain Stone (Seiryu Stone)

Limestone with Calcite veins (CaCO3)

Greyling Sandstone / Greywacke (Lithic Wacke (SiO2 + diverse mineral fragments)) — sedimentary

Greyling Sandstone / Greywacke

Lithic Wacke (SiO2 + diverse mineral fragments)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Botryoidal Chalcedony (Agate/Carnelian) (Chalcedony (SiO2)) — mineral

Botryoidal Chalcedony (Agate/Carnelian)

Chalcedony (SiO2)

Rough Ruby (Corundum (Al2O3) with Chromium traces) — mineral

Rough Ruby

Corundum (Al2O3) with Chromium traces

Botryoidal Malachite (Malachite - Cu2CO3(OH)2) — mineral

Botryoidal Malachite

Malachite - Cu2CO3(OH)2

Limonitic Iron Ore / Goethite (Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)) — sedimentary

Limonitic Iron Ore / Goethite

Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Carnelian (Chalcedony variety) (SiO2 (Silicon Dioxide)) — Mineral

Carnelian (Chalcedony variety)

SiO2 (Silicon Dioxide)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Banded Agate (specifically Red Agate or Sardonyx variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (specifically Red Agate or Sardonyx variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Smoky Quartz (Vein Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Cryptocrystalline Quartz (SiO2)) — sedimentary

Jasper

Cryptocrystalline Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Quartz / Quartzite Fragment (Silicon Dioxide (SiO2)) — mineral / metamorphic

Quartz / Quartzite Fragment

Silicon Dioxide (SiO2)

mineral / metamorphic

Quartz (Smoky/Milky variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variant)

Silicon Dioxide (SiO2)

Quartz (specifically Milky Quartz/Quartzite) (Silicon Dioxide (SiO2)) — Mineral

Quartz (specifically Milky Quartz/Quartzite)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Green Quartzite (Aventurine-like) (Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)) — metamorphic

Green Quartzite (Aventurine-like)

Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrous ferric oxide)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Milky Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — Mineral

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Jasper and Quartz conglomerate (River Rock) (Silicon Dioxide (SiO2) - Chalcedony and Quartz variety) — sedimentary

Jasper and Quartz conglomerate (River Rock)

Silicon Dioxide (SiO2) - Chalcedony and Quartz variety

Red Jasper (Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)) — mineral

Red Jasper

Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Pyrite (Iron Pyrites) (Iron Sulfide (FeS2)) — mineral

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)