Chalcedony with Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Or Metamorphic (Base Substrate)
Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.
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Gold
Gold (Au)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Citrine
Citrine (Silicon Dioxide, SiO2)
mineral
River Rock (Quartzite)
Quartzite (SiO2)
metamorphic
Quartzite
SiO2 (Quartzite)
metamorphic
Leopardite
Quartz porphyry / Quartz monzonite with manganese oxide spots
igneous
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz on Chlorite Schist
Chlorite Schist (Mg,Fe)3(Si,Al)4O10(OH)2 with Quartz (SiO2)
metamorphic
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Hawk's Eye / Pietersite (Tiger's Eye variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Graphite
Graphite (C)
mineral
Serpentine
Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Sandstone with Quarzite clasts
Arenite (SiO2 based)
sedimentary
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Riverstone Quartzite / Chalcedony Nugget
Silicon Dioxide (SiO2)
metamorphic
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Labradorite
Labradorite (Plagioclase Feldspar Series - (Ca, Na)(Al, Si)4O8)
mineral
Greenstone
Metabasalt (composed of chlorite, epidote, and actinolite)
metamorphic
Dinosaur Bone (Gembone)
Agatized Dinosaur Bone (Silicified Paleo-osteoid)
metamorphic
Mixed Gravel and Pebbles
Polylithic Alluvial Aggregate
igneous, sedimentary, and metamorphic mix
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Green Aventurine (or Xiuyan Jade / Serpentine)
Silicon Dioxide (SiO2) with Fuchsite inclusions or Magnesium Silicate
metamorphic
Garden Quartz (Lodolite)
Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)
mineral
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineralized Apatite / Bio-apatite)
fossil
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Ruby and Sapphire Cluster Ring
Corundum (Al2O3)
gemstone
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Biotite Schist
Biotite Schist (containing K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary