Chert with Calcite Veining
Microcrystalline Quartz (SiO2) with Calcium Carbonate (CaCO3) veins
sedimentary
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
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Chert (Flint / Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite Pebbles
Crystalline silica rock (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Garnet in Schist/Gneiss Matrix
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
metamorphic
Quartzite pebble
Quartzite (principally SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Pink Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Gneiss
High-grade foliated metamorphic rock
metamorphic
Honey calcite cluster
Calcite (calcium carbonate, CaCO₃)
mineral
River Stone (Green Quartzite)
Quartzite (Metamorphosed Sandstone)
metamorphic
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert / River Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Weathered Quartzite or Chert Pebble
Silicon Dioxide (SiO2)
metamorphic or sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Orange Quartzita (Calcite-stained Quarzite)
Metamorphic Silicon Dioxide (SiO2) with iron/calcium inclusions
metamorphic
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Green Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Cobble
Quartzite (predominantly SiO2)
metamorphic
Metallic sulfide ore, likely pyrite-bearing rock
Pyrite (FeS₂), possibly with chalcopyrite and quartz/host rock
mineral
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
mineral
Quartzite Pebble
Quartzite (SiO2 based)
metamorphic
Chert
Chert (SiO2)
sedimentary
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Yellow Quartz
Silicon Dioxide (SiO2)
mineral