Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Category
Biogenic Material
Browse biogenic material specimens identified by the Rock Identifier community.
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Green Onyx (Commercial Marble/Travertine)
CaCO3 (Calcite / Banded Limestone)
metamorphic
Coprolite
Fossilized Feces
fossil
Green Spot Jasper (Kiwi Jasper / Sesame Jasper)
Partially altered granitic rock rich in quartz, microcline feldspar, and tourmaline or amphibole inclusions
metamorphic
Raw Amber / Resin Mineral
Succinite (Fossilized Tree Resin)
gemstone
Granite River Cobble
Phaneritic Felsic Igneous Rock (Granite)
igneous
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Raw Diamond
Carbon (C)
gemstone
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet.
fossil
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Yellow Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Quartz)
Silicon dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Snowflake Obsidian
Volcanic Glass with Spherulite inclusions (Amorphous SiO2 + Cristobalite)
igneous
Moldavite
Moldavite (Silica-rich glass, SiO2 + Al2O3)
tektite
Chert (Flint/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Chert
Chert (SiO2)
sedimentary
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Moss Agate / Chalcedony
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion
Ferruginous Sandstone Concretion
sedimentary
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Agatized Fossil (Druzy Agate)
Silicon Dioxide (SiO2) replacing organic matter
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (and/or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Blue Topaz
Al2SiO4(F,OH)2
mineral
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Sandstone (Red Sandstone / River Stone)
Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)
sedimentary
White Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Limestone Cobble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Banded Chert (Agate-like Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (specifically Gray Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Green Moss Agate
Silicon Dioxide with inclusions (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (often called Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary