Druzy Quartz on Matrix (likely Limestone or Sandstone)
Silicon Dioxide (SiO2) with various trace impurities
Mineral on Sedimentary Rock
Category
Sedimentary Rock (Altered)
Browse sedimentary rock (altered) specimens identified by the Rock Identifier community.
Limonite stained Sandstone
Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)
sedimentary
Sandstone with Quartz Veining
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Greisen
Greisen
Metamorphic
Chert (Nodule)
Microcrystalline or Cryptocrystalline Silica (SiO2)
sedimentary
Sandstone (with Iron concretions/staining)
Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)
sedimentary
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
sedimentary
Sandstone or Mudstone
Sedimentary Rock (Sandstone/Mudstone)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Agate (Common Chalcedony)
Silicon Dioxide (SiO2)
mineral
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Druzy Quartz on Chalcedony Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
mineral
Gneiss (Pebble)
Gneiss
metamorphic
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 based with quartz grains)
sedimentary
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)
sedimentary
Biotite (Black Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Red Siltstone (or Red Shale)
Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)
sedimentary
Porphyritic Basalt (Chinese Flower Stone / Chrysanthemum Stone basalt variety)
Porphyritic Basalt containing Plagioclase Feldspar phenocrysts
igneous
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Quartz (Druzy on Matrix)
Silicon Dioxide (SiO2)
mineral
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Limonite (after Pyrite Pseudomorph)
Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)
mineral
Sandstone
Arenite
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary