Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)
Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein
sedimentary
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Gold Nugget
Gold (Au)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone Pebble
Sandstone (Silicon dioxide-rich clastic sedimentary rock)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Quartz Geode Segment
Crystalline Silicon Dioxide (SiO2)
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granite (Plutonic Igneous Rock)
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Mica Schist
Mica Schist (contains muscovite/biotite, quartz, plagioclase)
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Quartz Geode
Silicon dioxide (SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 principal)
sedimentary
Geode (Unopened)
Siliceous Geode (SiO2)
sedimentary
Diamond
Native Carbon (C)
mineral
Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
sedimentary
Diamond
Native Carbon (C)
mineral
Sapphire
Corundum (Al2O3)
mineral
Ruby
Corundum (Al2O3:Cr)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gold Nugget (or Gold Grain)
Native Gold (Au)
mineral
Ruby (Corundum)
Aluminum Oxide (Al₂O₃:Cr)
gemstone
Diamond
C (Carbon)
gemstone
Diamond
Carbon (C)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Pebble/Cobble)
Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)
Sedimentary
Fossilized Sea Urchin (Echinoid)
Echinoidea (Class) - likely replaced by Calcite or Quartz
sedimentary
Sandstone
Sandstone (SiO2 dominated clastic sedimentary rock)
sedimentary
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Sandstone
Arenite (lithic or quartz sandstone)
sedimentary
Sapphire
Corundum (Al2O3)
Mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral