Garnet-bearing granite or pegmatitic granitic rock
Coarse-grained granitoid, likely granite or pegmatite, composed mainly of quartz and feldspar with almandine/spessartine garnet and dark biotite or amphibole
igneous
Category
Organic (Non Rock)
Browse organic (non rock) specimens identified by the Rock Identifier community.
Learn about Organic (Non Rock) in the encyclopedia
View all →
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Metamorphic
Orange Tabby (Felis catus)
Felis silvestris catus (variety: Red Mackerel Tabby)
Organic/Biological specimen (Non-Mineral)
Chalcedony Geode
Chalcedony (SiO2) within a geode structure
Mineral Geode/Sedimentary or Volcanic related
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Banded Gneiss
Gneiss (pronounced 'nice')
metamorphic
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Organic Gemstone (Sedimentary classification)
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Mineraloid
Common Opal
Amorphous Hydrated Silica (SiO2·nH2O)
mineral
Common Green Opal
Hydrated amorphous silicon dioxide (SiO2·nH2O)
mineral
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (fossilized organic resin)
mineral
Gossan (Limonite/Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Black Chert
Carbonaceous Chert (Silicon dioxide, SiO2)
sedimentary
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Gneiss
Gneiss
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Soapstone
Steatite (Hydrated magnesium silicate)
metamorphic
Quartz River Pebble with Algae
Silicon Dioxide (SiO2) with organic biofilm
metamorphic or igneous
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Chiton (Polyplacophora)
Polyplacophora (fossilized valves)
mineralized fossil
Limestone with Fossil Inclusion
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Limestone (River or Sea Cobble)
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (C10H16O)
mineraloid
Travertine (Tufa)
Chemical Limestone (CaCO3)
sedimentary
Chert (Chalcedony)
Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood Fragment
Silicified Wood (SiO2)
fossil
Graphite
Graphite (Carbon, C)
mineral
Chert (Arrowhead/Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Graphite
Carbon (C)
mineral
Limestone with Bitumen/Chert
Calcite (CaCO3) containing organic hydrocarbons
sedimentary
Barite (Desert Diamond)
Barite (Barium Sulfate, BaSO4)
mineral
Petrified Wood
Silicified wood (primarily SiO2)
fossil
Amber
Succinite (approximate formula C10H16O)
mineral
Sandstone with Iron Oxide Concretion
Arenite with Hematite/Goethite Concretion
sedimentary
Chert / Flint pebble
Microcrystalline quartz (SiO2)
sedimentary
Limestone (containing Fossil Mold)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral