River Cobble (Phyllite or Quartzite)
Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)
metamorphic
Category
Metamorphic Rock (Composed Of Multiple Minerals)
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River Cobble (Basaltic/Andesitic)
Mafic Igneous Porphyritic Rock
igneous
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Sandstone (Ferruginous)
Arenite with Hematite cement (SiO2 + Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
igneous
Amygdaloidal Basalt
Vesicular-Amygdaloidal Basalt (Mafic Extrusive)
igneous
Galena
Lead(II) sulfide (PbS)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Liesegang Stone (Sandstone with Liesegang Rings)
Clastic sedimentary rock with li-secondary iron oxide mineralization
sedimentary
Pink Feldspar
Orthoclase (KAlSi3O8) or Microcline
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Nuummite
Antophyllite-Gedrite (Orthorhombic amphiboles)
metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Botryoidal Chalcedony with Calcite
Chalcedony (SiO2 with accessory minerals, likely CaCO3)
Mineral
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Mineral
Granite (Pink/Red variety)
Phaneritic Felsic Intrusive Igneous Rock (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite (Epidote-Feldspar rock)
Metamorphic rock
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Coquina
Coquina (a type of limestone)
Sedimentary
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
sedimentary
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
![Garnet in Matrix (Eclogite) (Eclogite, featuring Almandine or Pyrope Garnet [X3Y2(SiO4)3]) — metamorphic](https://media.rockidentification.com/a7ec3f8a-b87b-486e-b45f-1dd4612a59cc-thumbnail.jpg)
Garnet in Matrix (Eclogite)
Eclogite, featuring Almandine or Pyrope Garnet [X3Y2(SiO4)3]
metamorphic
Phyllite
Phyllite (regional metamorphic rock)
metamorphic
Quartzite with Hematite staining
Metamorphic Rock (rich in SiO2)
metamorphic
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Quartzite Pebble (with Iron Inclusions)
Metamorphic Rock (Mainly SiO2)
metamorphic
Pink Quartzite
Silica (SiO2) - Metamorphic rock
metamorphic
Quartzite pebble
Metamorphic rock (mainly SiO2)
metamorphic
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
metamorphic
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic