Metamorphic Rock (Composed Of Multiple Minerals)

Almandine Garnet in Schist Matrix

Almandine - Fe3Al2(SiO4)3

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Biotite Gneiss

Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)

Conglomerate

Conglomerate

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Dalmatian Stone

Dalmatian Jasper / Feldspathic Igneous Rock

Gastropod Steinkern (Internal Mold Fossil)

Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

Schist

Mica Schist

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Gneiss (with Quartzite and Mica)

Gneiss

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Dragon Blood Jasper

Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

Sandstone

Clastic Sedimentary Rock (composed of SiO2 grains)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Shale

Shale (comprised mostly of clay minerals and quartz)

Quartzite with Iron Inclusions

Metamorphic Quartzite (SiO2 with Fe2O3 trace impurities)

Agate (Moss or Dendritic Agate)

Chalcedony (Silicon Dioxide, SiO2)

Basalt

Basalt (Mafic volcanic rock)

Sandstone (Weathered Coastal Boulder)

Arenite (composed primarily of SiO2)

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Greenstone

Metabasalt / Greenschist facies rock

Fuchsite

Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss

Greenstone / Quartzite Pebble

Metamorphosed Quartz-rich Rock

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)