Mineral Based Alloy (Anthropogenic)

K2 Jasper (K2 Granite)

Azurite in Granite (K(Mg,Fe)3AlSi3O10(OH,F)2 + Cu3(CO3)2(OH)2)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Mica-rich Schist fragment

Mica Schist

Muscovite Mica in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

Lepidolite

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

Dalmatian Stone (commonly called Dalmatian Jasper)

Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)

Red Jasper (Siltstone or Chert-based Jasper)

Silicon dioxide with hematite (SiO2 + Fe2O3)

Sandstone (Greywacke/Siltstone variant)

Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Schist

Mica Schist

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Lepidolite

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

Granite

Phaneritic Plutonic Felsic Rock

Quartz on Schist

Silicon Dioxide (SiO2) on Foliated Metamorphic Rock

Limestone

Sedimentary rock composed of Calcium Carbonate (CaCO3)

Chert (often colloquially called Flint)

Chert (Microcrystalline Quartz, SiO2)

Basalt with Quartz/Plagioclase Inclusions

Mafic volcanic rock (Basaltic)

Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)

Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Lepidolite with Rubellite Tourmaline

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

Fuchsite

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

Graphite

Graphite (Native Carbon, C)

Quartz (Iron-stained or Rose variant)

Silicon Dioxide (SiO2)

Amethyst Quartz

Silicon Dioxide (SiO2) with iron impurities

Leopard Skin Jasper

Jasper (Silicon Dioxide with impurities), SiO2

Citrine Quartz

SiO2 (Silicon Dioxide with Iron impurities)

Green Apophyllite on Stilbite

Fluorapophyllite-(K) [(KCa4Si8O20F)·8H2O] and Stilbite [NaCa4(Si27Al9)O72·28H2O]

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Heat-Treated Citrine (Amethyst Cathedral with Agate inclusions)

Silicon Dioxide (SiO2) with iron impurities

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Schist

Mica Schist

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Graphite

Graphite (C)

Diorite

Diorite (Intermediate intrusive igneous rock)

Granodiorite

Granodiorite (intermediate intrusive igneous rock)

Breccia

Breccia

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Chert (with Limestone and Iron Oxide staining)

Cryptocrystalline Quartz (SiO2)

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)