Pyrite
Iron Disulfide (FeS2)
mineral
Category
Igneous And Sedimentary
Browse igneous and sedimentary specimens identified by the Rock Identifier community.
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Chinese Writing Stone
Porphyritic Basalt or Andesite with Feldspar phenocrysts (likely Orthoclase or Plagioclase)
igneous
Wonderstone
Rhyolite (Silicon Dioxide with Iron Oxide impurities)
igneous
Banded Agate (River-worn Pebble)
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Green Moss Agate
Silicon Dioxide with inclusions (SiO2)
sedimentary
Beryl (likely Pink/Morganite variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Lava Stone and Chakra Beads
Basalt (with various mineral/synthetic beads)
igneous
Red Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Rhyolite
Rhyolite (Extrusive Igneous Rock)
igneous
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Sand (Construction Grade)
Unconsolidated siliciclastic sediment (primarily SiO2)
sedimentary
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Pumice
Pumice (Amorphous volcanic glass)
Igneous
Banded Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz chunk
Silicon dioxide (SiO2)
mineral
Yellow Jade (Yellow Chalcedony/Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Unidentifiable Specimen
Undetermined
Unknown
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz Cluster
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (SiO2 with iron oxide impurities)
mineral
Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic