Schist with Quartz Veins
Schist with Quartz (SiO2)
metamorphic
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
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Mosasaur Tooth Fossil
Mosasaurus sp.
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Fossilized Shark Tooth
Eocene Lamniformes (Mackerel Shark clade)
fossil
Bivalve Fossil (Clam)
Class Bivalvia, likely Mercenaria or similar genus
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Geode with Quartz Crystal Cavity
Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix
sedimentary
Petrified Wood
Silicified wood (primarily Quartz/Chalcedony, SiO2)
metamorphic
Chert Nodule
Microcrystalline Silica (SiO2)
sedimentary
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Pink Granite
Granite (Felsic intrusive igneous rock)
igneous
Weathered sandstone or tuff fragment
Likely quartz-rich sandstone (SiO₂) or porous volcanic tuff; exact identification requires testing
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pink Quartzite
Quartzite (principally Silicon Dioxide, SiO2)
metamorphic
Coquina
Biogenic Limestone (mostly Calcium Carbonate, CaCO3)
sedimentary
Tumbled rose quartz
Rose quartz (pink quartz), silicon dioxide, SiO₂
mineral
Honey/brown agate (chalcedony)
Microcrystalline quartz, SiO₂; likely translucent agate or chalcedony
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (C)
Mineral
Diamond (Princess Cut)
Carbon (C)
mineral
Chondrite Meteorite
Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)
Mineral
Granite Pebble
Granite (Felsic intrusive igneous rock)
igneous
Diorite
Intermediate plutonic igneous rock
igneous
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Jade
Jadeite or Nephrite
Mineral/Mineraloid
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Shale
Shale (clastic sedimentary rock)
sedimentary
Fossil Shark Teeth (likely Sand Tiger Shark)
Carcharias taurus (fossilized dentition)
fossil
Sandstone / Weathered Chert
Silicon Dioxide (SiO2) / Quartz-rich Clastic Rock
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Diorite (River Pebble)
Intermediate Phaneritic Igneous Rock
igneous
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (variable SiO2 composition)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Slate
Slate
metamorphic
Diorite (Salt and Pepper Rock)
Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)
igneous