K2 Jasper (K2 Granite)
Azurite in Granite (Biotite Granite with Azurite inclusions)
igneous
Category
Mineral Based Human Made Alloy
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Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Schist
Mica Schist
metamorphic
Wishing Stone (Basalt/Greywacke with Quartz Vein)
Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion
igneous/sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Fossilized Shark Tooth (Root Portion)
Selachimorpha (partial specimen)
fossil
Granite
Phaneritic plutonic rock (SiO2 typically >69%)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Schist
Schist (Metamorphic Rock)
metamorphic
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral
Biotite on Quartz
Biotite Mica (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Limestone with Calcite Crust
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Granite
Granite (Alkali feldspar, Plagioclase feldspar, and Quartz)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
![Lepidolite and Rubellite (Pink Tourmaline) (Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2] and Rubellite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4]) — igneous](https://media.rockidentification.com/b648846b-7d52-4820-886f-adda463c0f3c-thumbnail.jpg)
Lepidolite and Rubellite (Pink Tourmaline)
Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2] and Rubellite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4]
igneous
Blue Topaz
Al2SiO4(F,OH)2
gemstone
Schist
Mica Schist
metamorphic
Fossilized Stingray Mouth Plate
Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)
fossil
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Amazonite (likely mixed with other feldspars/minerals)
Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.
Mineral
Silver (Jewelry Specimen)
Native Silver (Ag)
Mineral (Native Element)
Copper Ore (with Azurite and Malachite)
Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)
mineral
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (SiO2 + impurities)
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Grey Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Basalt with Porphyritic Texture
Porphyritic Basalt
igneous
Vesicular Basalt with Siltstone
Mafic Volcanic Rock (Basaltic Composition)
igneous
Quartz Vein in Host Rock (Gabbro or Basalt)
Silicon Dioxide (SiO2) with Mafic Silicates
metamorphic/igneous
Tumbled sodalite with white calcite veining
Sodalite, Na8(Al6Si6O24)Cl2, commonly intergrown with calcite, CaCO3
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)3O8
mineral
Flint
Microcrystalline Quartz (SiO2)
sedimentary
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Chert (Nodular Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Common Opal mix)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Pebble
Silicon dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Chalcedony variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary