Rock Identifier

Category

Mineral (Specifically A Mineraloid)

Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.

Yellow Jasper (Silicon Dioxide with Iron inclusions (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide with Iron inclusions (SiO2)

Limestone (specifically Dolomitic/Crystalline Limestone) (Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)) — sedimentary

Limestone (specifically Dolomitic/Crystalline Limestone)

Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)

Chert (or Flint) (SiO2 (predominantly microcrystalline quartz)) — Sedimentary

Chert (or Flint)

SiO2 (predominantly microcrystalline quartz)

Chert (specifically Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint)

Cryptocrystalline Quartz (SiO2)

Granite (specifically Red Granite) (Phaneritic Plutonic Rock (High in Alkali Feldspar and Quartz)) — igneous

Granite (specifically Red Granite)

Phaneritic Plutonic Rock (High in Alkali Feldspar and Quartz)

Chert (specifically Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (specifically Flint)

Silicon dioxide (SiO2)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Ferruginous Slag (Iron Smelting Byproduct) (Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)) — Antropogenic Glass / Mineraloid

Ferruginous Slag (Iron Smelting Byproduct)

Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)

Antropogenic Glass / Mineraloid

Chert (specifically Jasper) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Sandstone (River Cobble) (Arenite) — sedimentary

Sandstone (River Cobble)

Arenite

Chert (specifically Tan/Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Basalt River Pebble (Aphanitic Mafic Basalt) — igneous

Basalt River Pebble

Aphanitic Mafic Basalt

Riverstone (Water-worn Quartzite) (Quartzite (SiO2)) — metamorphic

Riverstone (Water-worn Quartzite)

Quartzite (SiO2)

Red Jasper (Jasper (a variety of Chalcedony, SiO₂)) — Mineraloid (cryptocrystalline quartz)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂)

Mineraloid (cryptocrystalline quartz)

Chert (specifically Pink Chert or Jasperized Chert) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (specifically Pink Chert or Jasperized Chert)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (specifically Pink/Tan Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Pink/Tan Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Red Chert / Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Red Chert / Flint)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Jasper-Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Jasper-Chert)

Silicon Dioxide (SiO2)

Chert (specifically White Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Black Chert or Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Black Chert or Flint)

Cryptocrystalline Quartz (SiO2)

Chert (specifically White Chert or Novaculite) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO₂)

Porphyry (specifically Porphyritic Rhyolite or Andesite) (Porphyritic Igneous Rock (composed of Phenocrysts in an Aphanitic groundmass)) — igneous

Porphyry (specifically Porphyritic Rhyolite or Andesite)

Porphyritic Igneous Rock (composed of Phenocrysts in an Aphanitic groundmass)

Chert (specifically White Chert or Novaculite) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (specifically White Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Black Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Black Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Gray/Blue-Gray Chert) (Chert (SiO2)) — sedimentary

Chert (specifically Gray/Blue-Gray Chert)

Chert (SiO2)

Slag (Industrial Glass/Metal Waste) (Artificial silicate/ferro-silicate byproduct) — Mineraloid (Industrial byproduct)

Slag (Industrial Glass/Metal Waste)

Artificial silicate/ferro-silicate byproduct

Mineraloid (Industrial byproduct)

Puddingstone (specifically Michigan/Gowganda Puddingstone) (Conglomerate (Jasper Conglomerate)) — sedimentary

Puddingstone (specifically Michigan/Gowganda Puddingstone)

Conglomerate (Jasper Conglomerate)

Green Slag (Anthropogenic Silicate Glass) — Mineraloid (Industrial byproduct)

Green Slag

Anthropogenic Silicate Glass

Mineraloid (Industrial byproduct)

Porphyry (specifically Porphyritic Basalt or Andesite) (Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)) — igneous

Porphyry (specifically Porphyritic Basalt or Andesite)

Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)

Chert (specifically Brown Chert or Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Brown Chert or Flint)

Cryptocrystalline Quartz (SiO2)

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag) (Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)) — mineraloid / industrial byproduct

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

mineraloid / industrial byproduct

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Quartzite Pebble (Metamorphosed Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Sandstone (SiO2)

Chert (specifically Tan/Yellow Chert) (Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (specifically Tan/Yellow Chert)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (specifically Red Chert/Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Red Chert/Jasper)

Microcrystalline Quartz (SiO2)

Chert (specifically Red Chert / Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Red Chert / Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Tan/Yellow Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Tan/Yellow Chert)

Silicon Dioxide (SiO2)

Chert (specifically Blue Chert/Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically as a lithic artifact/projectile point) (Chert (Silicon dioxide, SiO2)) — sedimentary

Chert (specifically as a lithic artifact/projectile point)

Chert (Silicon dioxide, SiO2)

Synthetic Resin / Plastic Figurine (Synthetic Polymer (Copolymer of Polyethylene or Resin)) — Mineraloid-like Synthetic Material

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Mineraloid-like Synthetic Material