Rock Identifier

Category

Mineral (Processed Alloy)

Browse mineral (processed alloy) specimens identified by the Rock Identifier community.

Pearl (Biogenic Mineraloid) (Calcium carbonate (Aragonite) and Conchiolin, CaCO3) — mineral

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

Dyed Quartz Geode (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

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

Quartz (Iron-stained or Milky)

Silicon Dioxide (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Milky Quartz with Chlorite/Mica inclusions (Silicon Dioxide (SiO2) with phyllosilicate inclusions) — mineral

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Diamond (or Cubic Zirconia) (Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ) — mineral

Diamond (or Cubic Zirconia)

Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ

Blue Slag Glass (Man-made Silicon Dioxide (Amorphous)) — Anthropogenic (Man-made)

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Anthropogenic (Man-made)

Gravel and River Pebbles (Unconsolidated rock fragments / Detrital sediment) — sedimentary

Gravel and River Pebbles

Unconsolidated rock fragments / Detrital sediment

Cubic Zirconia (Cubic Zirconium Dioxide (ZrO2)) — gemstone

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Quartz Boulder (Silicon Dioxide (SiO2)) — mineral

Quartz Boulder

Silicon Dioxide (SiO2)

Red Sandstone (Siltstone pebble) (Arenite / Siltstone (Silicon dioxide based with hematite impurities)) — sedimentary

Red Sandstone (Siltstone pebble)

Arenite / Siltstone (Silicon dioxide based with hematite impurities)

Fossil Coral (Rugosa or Tabulata coral fossil) — fossil

Fossil Coral

Rugosa or Tabulata coral fossil

Petrified Wood (Silicified Paleoxylon (SiO2)) — fossil

Petrified Wood

Silicified Paleoxylon (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Septarian Nodule (Polished) (Septarian concretion (Calcite, Aragonite, Limestone)) — sedimentary

Septarian Nodule (Polished)

Septarian concretion (Calcite, Aragonite, Limestone)

Jasper (Iron-stained Chalcedony) (SiO2 with Fe2O3 (Iron Oxide) impurities) — Sedimentary / Mineral (Silica)

Jasper (Iron-stained Chalcedony)

SiO2 with Fe2O3 (Iron Oxide) impurities

Sedimentary / Mineral (Silica)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper with Iron Staining (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Iron Staining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Petrified Wood (Siliconized Wood (SiO2)) — sedimentary

Petrified Wood

Siliconized Wood (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Jasper (specifically Fancy or Polychrome Jasper) (Silicon Dioxide (SiO2) - Chalcedony) — Sedimentary

Jasper (specifically Fancy or Polychrome Jasper)

Silicon Dioxide (SiO2) - Chalcedony

Fossilized Echinoid (Sea Urchin) (Echinoidea (Fossil)) — sedimentary

Fossilized Echinoid (Sea Urchin)

Echinoidea (Fossil)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Halite (Halite (NaCl)) — mineral

Halite

Halite (NaCl)

Petrified Wood (Silicified Wood (SiO2 permineralization)) — fossil

Petrified Wood

Silicified Wood (SiO2 permineralization)

Dyed Chalcedony (Agate) (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Petrified Wood (Silicified Wood (primarily SiO₂ / Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Tiger's Eye (Golden) (Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)) — mineral

Tiger's Eye (Golden)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Dream Amethyst (Chevron Amethyst) (Silicon Dioxide (SiO2) with iron impurities and gamma radiation exposure) — Mineral

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with iron impurities and gamma radiation exposure

Petrified Wood (Silicified Wood (primarily Quartz or Chalcedony, SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily Quartz or Chalcedony, SiO2)

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — Mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Tiger's Eye (Silicon Dioxide (SiO2) with Limonite/Goethite inclusions) — mineral

Tiger's Eye

Silicon Dioxide (SiO2) with Limonite/Goethite inclusions

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Vug / Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Vug / Druzy Quartz

Silicon Dioxide (SiO2)

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

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

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon dioxide (SiO2)) — mineral

Quartz Pebble

Silicon dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Concrete (Anthropogenic Conglomerate) — sedimentary

Concrete

Anthropogenic Conglomerate