Sandstone
Arenite
sedimentary
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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Bloodstone
Chalcedony variety Heliotrope (SiO2 with inclusions)
mineral
Citrine (Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
mineral
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz)
sedimentary
Bloodstone
Chalcedony (cryptocrystalline quartz)
Mineral/Semiprecious Stone
Graphite
Graphite (Carbon, C)
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Gravel (Crushed Stone Aggregates)
Mixed Siliciclastic / Carbonate Aggregate
sedimentary
River Stone (Greywacke)
Greywacke (immature sandstone)
sedimentary
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)
sedimentary
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite
Granite (High-silica plutonic rock)
igneous
Hag Stone
Perforated Sedimentary Rock / Flint / Limestone
sedimentary
Titanium Quartz (Aura Quartz)
Silicon Dioxide (SiO2) treated with Titanium
mineral
Biotite Schist
Schist (Biotite-dominated)
metamorphic
Likely polished leopard-skin jasper or brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone
sedimentary
Granite
Phaneritic Igneous Rock (Granite)
igneous
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
igneous
Granite
Granite
igneous
Fossilized Shark Tooth
Elasmobranchii dentition (calcium phosphate / hydroxyapatite)
fossil
Imperial Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Basalt with Olivine Phenocrysts
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)
Basalt
Mafic Igneous Rock
igneous
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Sandstone/Quartzite
Sedimentary Rock (composed mainly of SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Quartz with Chlorite or Hornblende inclusions
Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Dalmatian Jasper
Peralkaline rhyolite with arfvedsonite inclusions
igneous
Sandstone
Sandstone ( преимущественно SiO2 )
sedimentary
Sandstone (likely Greywacke variant)
Arenite
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
sedimentary and igneous (mixed)