Granite
Phaneritic intrusive igneous rock
igneous
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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Dyed Pink Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Basalt (River Stone)
Extrusive mafic igneous rock
igneous
Sandstone (Ferruginous)
Arenite with Iron-oxide inclusions (SiO2 primarily)
sedimentary
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
mineral
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Sulfur
Sulfur (S8)
mineral
Sandstone (with Liesegang rings or Oxidation)
Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)
sedimentary
Aragonite Star Cluster
Aragonite (Calcium Carbonate - CaCO3)
mineral
Basalt
Mafic Igneous Pebble
igneous
Common Opal
Hydrated amorphous form of silica (SiO2·nH2O)
mineral
Granite Pebble
Granitoid (comprised of Quartz, Feldspar, and Mica)
igneous
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Chert (Quartz-rich)
Microcrystalline Silica (SiO2)
sedimentary
Agate (Plume or Moss Agate variant)
Chalcedony (SiO2) with various inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt or Siltstone Pebbles
Mafic volcanic rock (Basalt) or Indurated Siltstone
igneous or sedimentary
K2 Jasper
Azurite in Granite
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Mineral
Cobaltian Calcite (Cobaltoan Calcite)
Cobalt-bearing Calcite (Ca,Co)CO3
mineral
Jasper pebble
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary (secondary classification: cryptocrystalline quartz)
Liesegang Banded Sandstone (Wonderstone)
Ferruginous Sandstone with Liesegang Rings
sedimentary
Granite Cobble
Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)
igneous
Unopened Geode
Geode (containing various mineralization like Quartz SiO2)
sedimentary
Quartz and Mixed Sedimentary Rocks
Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies
sedimentary
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Limestone (with Calcite Veining)
Calcium Carbonate (CaCO3)
sedimentary
Granite Pebble
Granite (Phaneritic Acidic Igneous Rock)
igneous
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Native Gold
Native Gold (Au)
mineral
River Stone (River Rock)
Smooth Clastic Sedimentary Rock
sedimentary
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Carnelian (a variety of Chalcedony)
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Basalt River Pebble
Mafic Igneous Rock (Fine-grained Basalt)
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Gravel or Pebble
Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)
sedimentary
Basalt (Water-worn pebble)
Basalt (Aphanitic mafic volcanic rock)
igneous
White Chalcedony (likely Common Opal or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite
sedimentary