Botryoidal Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Category
Mixed: Igneous And Sedimentary
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
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Gneiss
Gneiss
metamorphic
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)
sedimentary
Gold
Native Gold (Au)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
mineral
Chalcedony (Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Rainbow Moonstone
White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8
gemstone
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Native Gold (in Jewelry)
Gold (Au)
mineral
Red Quartz (Carnelian/Red Jasper Agate)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Quartz (Blue Chalcedony/Dumortierite Quartz)
Silicon Dioxide (SiO2) with inclusions (typically Dumortierite Al7(BO3)(SiO4)3O3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (Jasper-Agate)
Silicon Dioxide (SiO₂)
Mineral
Chalcedony (Carnelian Agate pebble)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic
Gneissic River Pebble
Gneiss
metamorphic
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral