Magnetite (potentially as a Lodestone or within Ironstone)
Magnetite (Fe3O4)
mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Agate (Carnelian type)
Silicon Dioxide (SiO2)
mineral
Quartz Geode in Chert/Limestone Matrix
Silicon Dioxide (SiO2) within Sedimentary Host Rock
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
mineral
Banded Agate (Lake Superior Agate type)
Agate (Cryptocrystalline Variety of Quartz, SiO2)
mineral
Basalt with Epidote (Flowerstone-like texture)
Amygdaloidal Basalt (silicate mineral inclusions)
igneous
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Yellow Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (specifically Citrine or Yellow Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt (Gravel Pebble)
Basalt (contains pyroxene, plagioclase feldspar, and olivine)
igneous
Sandstone Concretion
Limonitic Sandstone Concretion
sedimentary
Banded Agate (Yellow Agate)
Silicon Dioxide (SiO2)
mineral
Quartzite with vugs/druzy quartz
Crystalline Silicon Dioxide (SiO2)
metamorphic
Azurite Malachite (Mixed)
Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
mineral
Chert (Nodule)
Chert (SiO2)
sedimentary
Chrysocolla
Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Granite (Weathered River Rock)
Granite (Phaneritic Igneous Rock)
igneous
River Stone (composed of Siltstone/Basalt mixture)
Siltstone or microcrystalline Basalt pebble
sedimentary
Limonite/Ironstone
Limonite (FeO(OH)·nH2O)
mineral
Granite (weathered cobble)
Granite
igneous
Basalt
Basalt
igneous
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystalline)
Silicon Dioxide (SiO2)
mineral
Chert (Chert Nodule with Cortex)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Vesicular Basalt (or Porphyritic Scoria)
Vesicular Basalt
igneous
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
Limonite after Marcasite (Propeller Conchoid)
Goethite/Limonite pseudomorph after Marcasite (FeO(OH)·nH2O)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Granite (Weathered)
Course-grained Intrusive Igneous Rock
igneous
Phantom Quartz with Chlorite and Hematite inclusions
Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)
mineral
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary