Aquamarine (Tumbled)
Beryl (Be3Al2Si6O18)
mineral
Category
Mixed (Predominantly Sedimentary And Igneous)
Browse mixed (predominantly sedimentary and igneous) specimens identified by the Rock Identifier community.
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Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Garnet
Almandine/Pyrope Garnet (Silicate Mineral Group)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limonite Concretion
Goethite/Limonite concretion (FeO(OH)·nH2O)
sedimentary
Pyrite and Calcite (or Barite) Specimen
Iron Sulfide (FeS2) with Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Veined Quartz
SiO2 (Silicon Dioxide)
Mineral
Tumbled hematite (likely hematite-rich ironstone)
Hematite, Fe₂O₃; possibly mixed with magnetite or goethite
mineral
Agate (Brecciated / Moss Agate with Jasproid Inclusions)
Silicon Dioxide (SiO2)
mineral
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Banded Iron Formation (BIF) / Iron Ore
Hematite-Magnetite BIF (Fe2O3 / Fe3O4 mixed with SiO2)
sedimentary
Boji Stone (Pop Rocks or Moqui Marbles)
Iron-manganese oxide concretion (Goethite/Hematite/Jarosite)
sedimentary
Sandstone with Iron Oxide Concretions
Quartzose Sandstone with Limonite/Hematite
sedimentary
Citrine
Quartz (Silicon Dioxide - SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
gemstone
Moonstone with Black Tourmaline
Orthoclase (KAlSi3O8) with Schorl inclusions
mineral
Granite
Intrusive Igneous Rock
igneous
Malachite with Chrysocolla
Copper carbonate hydroxide (Cu2CO3(OH)2) and Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Red Sandstone Pebble
Sedimentary Quartz Arenite / Arkose
sedimentary
Tektite (Indochinite)
Tektite (Amorphous Meteoritic Glass)
igneous
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone (with Iron Staining)
Arenite (SiO2 predominantly)
sedimentary
Sandstone (Heart-shaped pebble)
Sedimentary Quartz Sandstone
sedimentary
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Granite
Intrusive Igneous Rock (Felsic)
igneous
Sandstone (Weathered Pebble)
Sedimentary Rock (Quartz arenite)
sedimentary
Jasper pebble (possibly Red Jasper or Lake Superior Agate/Jasper mix)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Sandstone
Arenite (predominantly SiO2)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Sandstone River Pebble
Arenite (SiO2 predominantly)
sedimentary
Sandstone
Arenite (predominantly SiO2)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Metallic sulfide mineral specimen, likely pyrite
Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate
mineral
Obsidian Arrowhead
Volcanic Glass (predominantly SiO2)
igneous