Green Fuchsite in Quartz (sometimes called Green Aventurine)
Fuchsite (Chrome-rich Muscovite) K(Al,Cr)2(AlSi3O10)(OH)2 in Quartz SiO2
metamorphic
Category
Man Made Material (Constructed)
Browse man made material (constructed) specimens identified by the Rock Identifier community.
Chert (Jasper/Quartzite river pebble)
Microcrystalline Silica (SiO2)
sedimentary
Amber
Succinite (C10H16O)
mineraloid
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Red Sandstone
Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Aventurine (Green)
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Banded Chert (River Stone/Cobble)
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
mineral
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Mica Schist
Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)
metamorphic
Quartz Pebble (Water-worn)
Silicon Dioxide (SiO2)
mineral
Quartz Conglomerate
Quartz Conglomerate (clastic sedimentary rock)
sedimentary
Granite
Phaneritic Acidic Igneous Rock (Granite)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Siltstone
Siltstone (primarily composed of SiO2, Al2O3, and phyllosilicates)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Quartz River Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Reddish Brown Claystone or Siltstone
Argillite / Siltstone / Claystone
sedimentary
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral
Sandstone Chert/Quartzite
Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite
sedimentary
Chert (Flint variety)
Chert (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Zebra Rock / Zebra Marble
Banded Limestone-Marble Transition
metamorphic
Chert (Common Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Serpentine (Serpentinite)
Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Diamond
Cubic Carbon (C)
mineral
Basalt
Extrusive mafic igneous rock
igneous
Rough Quartz (Alluvial Pebbles)
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper
Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic