Metamorphic (Likely Gneiss Or Schist Based On Texture)

Mica

Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Quartzite

Quartzite (primarily SiO2)

Sandstone (Weathered)

Arenite (primarily SiO2)

Gneiss

Gneiss

Mica Schist

Schist (Muscovite/Biotite Schist)

Sandstone

Arenite (SiO2 based with mineral cement)

Gneiss (specifically Biotite Gneiss)

Gneiss (high-grade metamorphic rock primarily composed of Silicates)

Sandstone

Arenite (SiO2 based with quartz grains)

Jade (likely Nephrite Jade based on appearance)

Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)

Mica Schist

Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)

Schist

Mica Schist

Biotite Schist with Garnet

Garnet-Biotite Schist

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Mica Schist

Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)

Schist

Mica Schist

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Schist

Mica Schist

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)

Mica Schist

Mica Schist (primarily Muscovite and Biotite phyllosilicates)

Mica Schist

Foliated Metamorphic Rock (Schist)

Fuchsite

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

Quartzite with Chert inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Biotite Mica

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

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Sandstone

Arenite (composed primarily of SiO2)

River Pebble (Gneiss or Quartzite variant)

Course-grained Metamorphic Rock (likely SiO2 dominant)

Mica Schist

Schist (Crystalline metamorphic rock)

Granitic Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Gneissic Metamorphic Rock

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Kyanite

Kyanite (Al2SiO5)

Gneiss

Gneiss

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Gneiss (specifically a water-worn pebble)

Gneiss

Orange Quartzite (Tumble-polished)

Quartzite (primarily SiO2)

Fuchsite

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

Schist (Micaceous)

Mica Schist

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Schist

Mica Schist

Muscovite on Quartz (Mica host rock)

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