Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Sedimentary Or Igneous (Secondary Formation)
Browse sedimentary or igneous (secondary formation) specimens identified by the Rock Identifier community.
Banded Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert (with Quartz Vein)
Microcrystalline silica (SiO2)
sedimentary
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
sedimentary
Granite
Granite (a common type of Felsic Intrusive Igneous Rock)
Igneous Rock
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
igneous
Iron Meteorite
Siderite (Fe-Ni alloy, primarily Kamacite and Taenite)
igneous
Banded Chert
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chalk (Limestone variant)
Calcium Carbonate (CaCO3)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
sedimentary
Felsic Igneous Rock (likely Rhyolite or weathered Granite)
Felsic Volcanic/Plutonic Rock
igneous
Amygdaloidal Basalt
Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Amygdaloidal Rhyolite
Rhyolite (felsic volcanic rock) with amygdules
igneous
Basalt (with possible quartz veinsing)
Basalt
igneous
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Carnelian
SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Greenschist / Chloritaform Schist
Chlorite Schist (Group of Silicate Minerals)
metamorphic
Chalcedony Geode
Chalcedony (SiO2) within a geode structure
Mineral Geode/Sedimentary or Volcanic related
Milky Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (SiO₂)
Mineral
Gneiss
Gneiss
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock with secondary mineral infilling)
igneous
Basalt
Basalt (Aphanitic-to-porphyritic mafic volcanic rock)
igneous
Acicular Azurite (indicated by deep blue, fibrous/fuzzy appearance)
Azurite (Copper Carbonate Hydroxide) - Cu3(CO3)2(OH)2
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Carnelian
Cryptocrystalline Quartz (SiO2 with iron oxide impurities)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Carnelian Agate/Jasper blend
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz (Milky or Rough Variety)
Silicon Dioxide (SiO2)
mineral
Diabase (Greenstone)
Diabase or Dolerite
igneous
Lepidolite in Quartz (or Lepidolite Ore)
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Quartz (SiO2)
igneous