Ironstone with Pyrite
Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)
sedimentary
Category
Mineral
Browse mineral specimens identified by the Rock Identifier community.
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Red Sandstone
Arenite (ferruginous sandstone)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
sedimentary
Limonite/Goethite nodule
Goethite (FeO(OH)) with Hydrated Iron Oxides
mineral
Epidote
Epidote - Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Granitic Pegmatite
Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)
igneous
Hydrothermal Quartz Breccia
Hydrothermal Breccia with Quartz and Chloritic/Epidote Clasts
metamorphic
Banded Gneiss and Siltstone River Stones
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Granite Cobble (River Stone)
Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)
igneous
Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)
Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)
igneous or sedimentary
Red Jade (Dyed Quartzite)
Silicon Dioxide (SiO2) - variety Quartzite
metamorphic
Granite
Granite (Alkali-feldspar granite)
igneous
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)
igneous
Granite
Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Granite
igneous
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Synthetic (Ceramic)
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Granite
Phaneritic Plutonic Igneous Rock (Rich in SiO2)
igneous
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Granite
Plutonic felsic igneous rock
igneous
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Mica Schist
Muscovite/Biotite Schist
metamorphic
Pink Granite
Granite (Phaneritic Igneous Rock)
igneous
Pink Granite
Granite (Felsic intrusive igneous rock)
igneous
Granite
Phaneritic plutonic rock (approx. 20-60% quartz, 35-90% feldspar)
igneous
Yellow Jasper
SiO2 (Silicon Dioxide)
sedimentary
Quartzite Geode or Crystalline Quartz Node
Silicon Dioxide (SiO2)
metamorphic
Wishing Stone
Greenschist or Basalt with Quartz/Calcite Vein
metamorphic
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Metamorphic
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Porphyritic Basalt
Porphyritic Basalt with Olivine phenocrysts
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pegmatite (Granite Pegmatite)
Intrusive Igneous Rock (Granite Pegmatite)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous
Gneiss
Gneiss
metamorphic
Amazonite
Tectosilicate Microcline (KAlSi3O8)
mineral
Gold-bearing Quartz (Auriferous Quartz)
Quartz (SiO2) with native Gold (Au) inclusions
mineral