Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with various inclusions
Mineral, variety of Quartz
Category
Igneous, Sedimentary, And Metamorphic
Browse igneous, sedimentary, and metamorphic specimens identified by the Rock Identifier community.
Garnet (likely Almandine or Pyrope)
Garnet Group (e.g., Almandine: Fe3Al2(SiO4)3; Pyrope: Mg3Al2(SiO4)3)
Mineral
Citrine
SiO2 (Silicon Dioxide)
Mineral
Pink Opal / Peruvian Opal
Hydrated amorphous silicon dioxide (SiO2·nH2O)
Mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
![Pyromorphite on Epidote (Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]) — mineral](https://media.rockidentification.com/3cbdc467-e5c5-447f-afde-c958e111a578-thumbnail.jpg)
Pyromorphite on Epidote
Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18 with iron traces)
mineral
Gold Nugget
Native Gold (Au)
Mineral
Gold
Aurum (Elemental Gold, Au)
Mineral, Metal (element)
Grey River Stone (Quartz-rich Quartzite/Siltstone)
Quartzite / Meta-siltstone (primarily SiO2)
Metamorphic (low-grade)
Strawberry Quartz
Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite
Mineral
Peridot (Olivine)
Olivine ((Mg,Fe)2SiO4)
Mineral
Epidote (Unakite-related)
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Quartz (Crystal Fragment)
Quartz / Silicon Dioxide (SiO2)
mineral
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Mineral
Rough Green Tourmaline (Verdelite)
Elbaite (Complex Borosilicate), Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Moonstone (Tumbled)
Orthoclase Feldspar (KAlSi3O8) with inclusions of Albite
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Muscovite Mica in Quartz Matrix
Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)
mineral
Green Quartz (Aventurine)
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)
Mineral
Grey Agate
Silicon Dioxide (SiO2) - variety: Agate/Chalcedony
mineral
Amazonite
Microcline (variety Amazonite) - K(AlSi3O8)
mineral
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Jasper and Basalt Mix (Dark Chert/Basalt River Pebble)
Silicon Dioxide (SiO2) or Mafic extrusive igneous rock
sedimentary or igneous
River Cobble (likely Basalt or Chert)
Siliceous River Rock / Microcrystalline Quartz / Mafic Igneous
igneous/sedimentary
Mica Schist
Foliated Metamorphic Rock (Schist)
metamorphic
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral