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Recent Rock Identifications
Explore rocks, minerals, and gemstones recently identified by our AI-powered system
Chert Nodule in Limestone
Chert (Microcrystalline Quartz, SiO2) and Limestone (Calcium Carbonate, CaCO3)
sedimentary
Pegmatite with Muscovite
Granitic Pegmatite (KAl2(AlSi3O10)(OH)2)
igneous
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
igneous
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Aura Quartz Geodes (Lab-Altered)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition
mineral
Dyed Alum or Dyed Quartz (Ornamental Crystal)
Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Gneiss
Gneiss
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Chert (Jasper variation)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Tan/Brown variety)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Brown Variety)
Microcrystalline quartz (SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Amethyst Geode
Amethyst (Silicon Dioxide, SiO2)
mineral
Amethyst Geode
Silicon dioxide (SiO2) with iron impurities
mineral
Parti Sapphire
Corundum (Al2O3)
mineral
Fossilized Brachiopod
Phylum Brachiopoda (replaced by Calcite/CaCO3)
sedimentary
Tumbled Stones (various)
Mixed Silica-based Minerals (primarily Quartz and Chalcedony)
mineral
Picture Jasper
Tectonically broken chalcedony (SiO2)
sedimentary
Epidote in Quartz (Epidosite)
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Yellow Aventurine
Quartz containing Muscovite or Mica inclusions (SiO2)
mineral
Amber
Amber (C10H16O)
mineral
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)
igneous
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Mica Schist with Garnet
Garnetiferous Mica Schist
metamorphic
Granite
Granite (composed mainly of Quartz, Feldspar, and Mica)
igneous
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartzite (Ferruginous)
Recrystallized Quartz (SiO2) with Iron Oxide inclusions
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Banded Iron Formation (Hematite/Magnetite-rich)
Banded Iron Formation (BIF)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Porphyry
Porphyritic Andesite/Basalt
igneous
Porphyritic Andesite
Andesite (porphyritic variety)
igneous
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