Fossil Shark Teeth (likely Sand Tiger Shark)
Carcharias taurus (fossilized dentition)
fossil
Category
Man Made Material (Simulated Mineral)
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Red Sandstone
Sandstone (lithic arenite / ferruginous sandstone)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂), commonly rose quartz colored by trace impurities and microscopic inclusions
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Likely chlorite-bearing schist (possibly greenschist)
Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar
metamorphic
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Porphyry (Basaltic / Andesitic Porphyry)
Porphyritic Basalt / Porphyritic Andesite
igneous
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz-bearing altered rock, possibly iron-stained quartz vein
Quartz (SiO₂) in a feldspathic/sericitized host, with iron-oxide staining
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Beach Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Veined Mudstone
Metasedimentary rock with Quartz (SiO2) veins
metamorphic
Jasper (Banded Argillite/Chert mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Chondrite Meteorite Fragment
Ordinary Chondrite (L or H type)
igneous
Honey-colored chalcedony (rough agate/chert)
Microcrystalline quartz, SiO₂; likely chalcedony with iron-oxide staining
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (with Limestone/Dolomite host)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon dioxide, SiO2
Mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Sodalite-bearing rock, likely sodalite-rich syenite or sodalite in feldspathic matrix
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, with probable feldspar and accessory minerals
mineral
Fossil coral (likely solitary rugose coral)
Rugosa; possibly genus Heliophyllum or similar
fossil
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Mica-rich schist, likely lepidolite or muscovite schist
Mica schist; predominantly muscovite KAl₂(AlSi₃O₁₀)(OH)₂, possibly lithium-rich lepidolite
metamorphic
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Veined Quartz
SiO2 (Silicon Dioxide)
Mineral