Metamorphic Rock (Primarily Composed Of Minerals)

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Unakite

Epidotized Granite

Sandstone

Clastic sedimentary rock (primarily SiO2)

Granite

Granite

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Slate

Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Sandstone

Arenite (SiO2 primarily)

Granite

Granite (Felsic Plutonic Rock)

Granite

Granite (Phaneritic intrusive igneous rock)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Sandstone

Arenite (composed primarily of SiO2)

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Gneiss (High-Grade Metamorphic Rock)

Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Sandstone

Arenite (primarily Quartz Arenite)

Marble

Metamorphic Limestone (CaCO3)

Granite Pebble

Granite (Phaneritic Quartz-Feldspar Rock)

Orange Calcite (likely polished specimen)

Calcite

Granite

Granite (Phaneritic Igneous Rock)

Andesite

Intermediate Volcanic Rock (Andesite)

Sandstone

Arenite (primarily SiO2)

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Bauxite

Bauxite (Aluminum Ore)

Quartzite Pebble

Metamorphic rock primarily composed of Silicon Dioxide (SiO2)

Lapis Lazuli (polished cabochon)

Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)

Lapis Lazuli

Sodium aluminum silicate with sulfur (main component: Lazurite [(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2])

Unakite

Epidotized Granite

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Dalmatian Stone

Dalmatian Jasper (not a true jasper, typically an igneous perthite)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Slate

Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2