Banded Gneiss
Gneiss
metamorphic
Category
Mineral Variant
Browse mineral variant specimens identified by the Rock Identifier community.
Learn about Mineral Variant in the encyclopedia
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Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Granite Cobble
Granite
igneous
Sandstone with Ironstone Concretion
Arenite with Ferruginous Cement
sedimentary
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Malachite
Copper Carbonate Hydroxide (Cu2CO3(OH)2)
mineral
Malachite
Malachite (Cu2CO3(OH)2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Vein-bearing metamorphic rock, likely gneiss or schist
Banded silicate rock; likely quartz–feldspar–mica gneiss with a quartz vein
metamorphic
Gneiss
Gneiss
metamorphic
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Botryoidal Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Jasper Mushroom Carving
Silicon Dioxide (Microcrystalline Quartz, SiO2)
mineral
Basalt with Vesicular/Amygdaloidal Alteration
Extrusive Igneous Rock (Mafic)
igneous
Epidote
Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Basalt with Amygdule
Aphanitic Mafic Volcanic Rock (Basalt) with Zeolite/Quartz Infill
igneous
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Gypsum (Selenite sand)
Calcium sulfate dihydrate (CaSO4·2H2O)
mineral
Fluorite on Host Rock
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone with Quartz/Calcite druse
Arenite with druse (SiO2 or CaCO3)
sedimentary
Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
sedimentary
Limonite Ironstone
Goethite-Limonite concretion / Iron oxide
sedimentary
Gneiss
Gneiss
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive volcanic rock)
igneous
Gneiss (Metamorphic Pebble)
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Diorite
Diorite (Phaneritic intermediate plutonic rock)
igneous
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Gneiss
Gneiss
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Granodiorite
Granodiorite
igneous
Pegmatite
Pegmatite (felsic intrusive igneous rock)
igneous
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Pink Granite (Unakite-bearing or Epidote-bearing Granite)
Plutonic Igneous Rock (Granite)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Granite
Phaneritic intrusive igneous rock (Quartz, Feldspar, Mica)
igneous