Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Category
Mineral Side Rock
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Sandstone
Arenite (Sedimentary Rock)
sedimentary
Granite Gneiss
Granitic Gneiss
Metamorphic
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic
Sandstone with Iron Staining
Clastic sedimentary rock (SiO2 with iron oxides)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
metamorphic
Druzy Quartz on Chert/Siltstone
Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix
sedimentary
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
igneous
Sandstone
Arenite (lithic or quartz sandstone)
sedimentary
Sandstone (likely with Quartz Veining)
Arenite (primarily SiO2)
sedimentary
Gabbro
Gabbro (Mafic Plutonic Rock)
igneous
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
igneous
Basalt with Calcite Veins
Basalt (containing CaCO3 inclusions)
igneous
Dyed Dalmatian Stone
Aplite (Alkali-feldspar granite) with Arfvedsonite
igneous
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Unidentified Rock Fragment
Unknown
Rock
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Sandstone (Tafoni Weathered)
Arenite (part of the Sandstone family)
sedimentary
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)
Porphyritic Basalt (Mafic Extrusive)
igneous
Gneiss
Gneiss
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (with possibly iron oxides and other minerals)
Sandstone
Sedimentary rock
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Shale
Lutaceous Rock (Sedimentary Mudrock)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Limonite (often after Pyrite)
Limonite (FeO(OH)·nH2O)
mineral
![Glauconite (Glauconitic Sandstone) (Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]) — sedimentary](https://media.rockidentification.com/ddee2737-ce89-4667-b94a-33db09e38765-thumbnail.jpg)
Glauconite (Glauconitic Sandstone)
Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]
sedimentary
Granite or Granitic Gneiss River Rock
Granite / Gneiss
Igneous or Metamorphic
Red Sandstone
Arenite with Iron Oxide (Hematite) cement
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Druzy Quartz Geode (Oco or Moroccan variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
sedimentary