Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Yellow Quartz (Citrine or Yellow Jasper) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2)

mineral
Red Jasper (Jasper (Silicon Dioxide, SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide, SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

mineral
Chert (Jasper) (Silicon dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon dioxide (SiO2)

sedimentary
Chalcedony (Common Opal or Agate variant) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

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

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

mineral
Quartz (SiO₂ (Silicon Dioxide)) — Mineral

Quartz

SiO₂ (Silicon Dioxide)

Mineral
Quartz Geode/Cluster (Quartz (SiO2)) — mineral

Quartz Geode/Cluster

Quartz (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Turquoise (Green variety) (Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (Green variety)

Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

mineral
Pink Quartzite (Quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Pink Quartzite

Quartzite (SiO2 with iron oxide inclusions)

metamorphic
Quartz (Peach/Orange variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Peach/Orange variety)

Silicon Dioxide (SiO2)

mineral
Chalcedony with Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Matrix

Silicon Dioxide (SiO2)

mineral
Carnelian (Carnelian (SiO2 - Silicon Dioxide with Hematite impurities)) — mineral

Carnelian

Carnelian (SiO2 - Silicon Dioxide with Hematite impurities)

mineral
Quartzite River Stone (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Stone

Quartzite (primarily SiO2)

metamorphic
Quartz Geode with Calcite (Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)) — Mineral/Geode

Quartz Geode with Calcite

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Mineral/Geode
Native Gold (Native Gold (Au)) — mineral

Native Gold

Native Gold (Au)

mineral
Quartzite (Yellow/Orange variety) (Quartzite (primarily SiO2)) — metamorphic

Quartzite (Yellow/Orange variety)

Quartzite (primarily SiO2)

metamorphic
Red Jasper (Silicon Dioxide (SiO2) - variety Jasper) — mineral

Red Jasper

Silicon Dioxide (SiO2) - variety Jasper

mineral
Red Jasper (Silicon dioxide (SiO2) with iron inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron inclusions

sedimentary
Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

metamorphic
Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

mineral
Yellow Aventurine (or Citrine-colored Quartz) (Silicon Dioxide (SiO2) with inclusions) — metamorphic

Yellow Aventurine (or Citrine-colored Quartz)

Silicon Dioxide (SiO2) with inclusions

metamorphic
Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

mineral
Clear Quartz Fragment (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

mineral
Milky Quartz (or Vein Quartz) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (or Vein Quartz)

Silicon Dioxide (SiO2)

mineral
Moss Agate and Druzy Quartz Carving (Cryptocrystalline Silica (SiO2) with impurities) — mineral

Moss Agate and Druzy Quartz Carving

Cryptocrystalline Silica (SiO2) with impurities

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Dalmatian Stone (often called Dalmatian Jasper) (Peralkaline Feldsphathic Igneous Rock) — igneous

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Feldsphathic Igneous Rock

igneous
Orbicular Rhyolite (Rainforest Jasper) (Rhyolite containing Spherulites (SiO2 with impurities)) — igneous

Orbicular Rhyolite (Rainforest Jasper)

Rhyolite containing Spherulites (SiO2 with impurities)

igneous
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Chalcedony (Botryoidal or Geode form) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal or Geode form)

Silicon Dioxide (SiO2)

mineral
Carnelian (Carnelian (Silica, SiO2)) — mineral

Carnelian

Carnelian (Silica, SiO2)

mineral
Carnelian (Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)) — mineral

Carnelian

Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (likely tumbled or naturally water-worn) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Mineral