Lapis Lazuli
Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Category
Mineral, Often A Rock Given Its Aggregate Nature
Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
sedimentary
Basalt Pebble
Extrusive mafic igneous rock
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Milky and Citrine-type Quartz
Silicon Dioxide (SiO2)
mineral
River Pebble (Quartz-rich)
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
![Malachite (Copper(II) carbonate hydroxide [Cu2CO3(OH)2]) — mineral](https://media.rockidentification.com/f49dcc13-912d-42ed-a11a-2ec92d7160c6-thumbnail.jpg)
Malachite
Copper(II) carbonate hydroxide [Cu2CO3(OH)2]
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
sedimentary
Pink Granite (Potassium-rich Granite)
Phaneritic Felsic Igneous Rock (primarily SiO2, Al2O3, K2O)
Igneous
Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
sedimentary
Chert (Jasper/Flint Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
igneous
Greenstone with Quartz Veining
Epidiorite or Metabasalt with SiO2 (Quartz) veins
metamorphic
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Metamorphic Rock
Sunstone
Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8
mineral
Sandstone
Arenite (composed primarily of SiO2, or Silicon Dioxide)
sedimentary
Quartz / Quartzite Pebble
Silicon Dioxide (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt Pebble
Basalt
igneous
Mookaite Jasper
Siliceous (chert) sedimentary rock, a form of Jasper
Sedimentary
Amethyst Lace Agate / Banded Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Andesite
Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)
igneous
Diorite
Diorite (an intrusive igneous rock)
igneous
Sandstone (Ferruginous/Red Sandstone)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Ferruginous Siltstone or Mudstone
Ferruginous Siltstone / Goethitic Sandstone
sedimentary
Unakite
Unakite (Metasomatized Granite)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Pumice
Pumiceous rhyolite
igneous
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Chert (often colloquially called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Sandstone
Arenite
sedimentary