Igneous Rock

Lapis Lazuli

Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Sandstone

Arenite (primarily SiO2)

Shungite

Non-crystalline carbon (similar to anthracite coal or meta-anthracite)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Greywacke with Quartz Vein

Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)

Serpentinite (often containing Jadeite/Nephrite)

Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4

Unakite (Epidotized Granite)

Unakite (Rock composed of Epidote Ca2(Al,Fe)3(SiO4)3(OH), Orthoclase KAlSi3O8, and Quartz SiO2)

Serpentinite

Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)

Unakite

Epidotized Granite

Schist

Mica Schist

Gold-bearing Quartz with Iron Oxides

Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)

Unakite

Epidotized Granite

Quartzite (Ferruginous)

Quartzite (major component SiO2 with Fe2O3 impurities)

Quartzite with Quartz Veins

Quartzite (chiefly SiO2)

Serpentine

Serpentinite (group of minerals including Antigorite, Lizardite, or Chrysotile) (Mg, Fe)3Si2O5(OH)4

Unakite

Unakite epidotized granite

Unakite

Unakite (altered granite)

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Unakite

Epidotized Granite

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)

Unakite

Epidotized Granite

Sandstone (Banded)

Clastic Sedimentary Rock: Arenite

Vesicular Sandstone

Clastic Sedimentary Rock (Sandstone)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Schist

Mica Schist

Quartzite

Quartzite (predominantly SiO2)

Quartzite Pebbler

Quartzite (mainly SiO2)

Unakite

Epidotized Granite

Unakite

Unakite (Metasomatized Granodiorite)

Limonite stained Sandstone

Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)

Agate (Lace Agate Geode Slice)

Silicon Dioxide (SiO2)

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Unakite

Unakite (Epidotized Granite)

Sandstone

Arenite (SiO2 based)

Quartzite River Pebble

Quartzite (primarily SiO2)

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Quartzite (Quartz-rich Cobble)

Quartzite (SiO2)

Unakite

Epidotized Granite

Glauconitic Sandstone

Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Quartzite

Quartzite (primarily SiO2)

Limestone with Quartz or Calcite Veining

Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions

Unakite

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) and KAlSi3O8)