Mineral Based Alloy (Anthropogenic)

Mica Schist with Quartz

Mica Schist (principally Muscovite and Biotite with Quartz veins)

Basalt with Calcite Veining

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with CaCO3 veins

Granite

Granite (Phaneritic igneous rock)

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Greenschist / Chloritaform Schist

Chlorite Schist (Group of Silicate Minerals)

Granite

Course-grained intrusive igneous rock

Diorite

Phaneritic intermediate plutonic rock

Granite

Granite

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Amygdaloidal Basalt

Basalt (Igneous Volcanic Rock with secondary mineral infilling)

Heat-Treated Citrine (Amethyst Geode Fragment)

Silicon Dioxide (SiO2) with iron impurities

Fossilized Shark Tooth

Elasmobranchii fossil (likely Odontaspididae family)

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Desert Varnish on Sandstone

Ferromanganese coating on Quartz Arenite

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Sandstone (Ferruginous)

Arenite (Fe-rich)

Lepidolite

K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)

Mica (specimen appears to be Muscovite or Phlogopite)

Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2

Sandstone

Arenite (composed primarily of SiO2)

Mica Schist

Mica Schist (Muscovite subclass)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Graphite

Graphite (Native Carbon), Formula: C

Granite (River-worn Cobble)

Phaneritic Felsic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Plum Blossom Tourmaline

Tourmaline with Lepidolite (Na,Ca)(Li,Mg,Al)3Al6(BO3)3Si6O18(OH)4

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Ironstone (Limonite/Hematite)

Ferruginous Sedimentary Rock (composed largely of Fe2O3 and FeO(OH)·nH2O)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Vesicular Basalt

Vesicular Basalt

Chalcedony with Druzy Quartz Geode

Silicon Dioxide (SiO2)

Lepidolite

Lepidolite - K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)

Schist

Mica Schist

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

Dalmatian Jasper

Dalmatian Stone (not a true Jasper, primarily a Perthitic Feldspar with Arfvedsonite)

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Aquamarine

Beryl (Be3Al2Si6O18)