Mineral In Metamorphic Rock

Rose quartz

Quartz (silicon dioxide, SiO₂), pink variety

Weathered quartz-rich pebble

Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Gravel (Crushed Stone Aggregates)

Mixed Siliciclastic / Carbonate Aggregate

Gneiss

Gneiss

Eclogite

Eclogite (Omphacite-Garnet Rock)

Schist

Mica Schist

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Beach Pebble (Quartzite / Sandstone)

Quartz-rich sedimentary or metamorphic rock pebble

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Milky Quartz

Silicon Dioxide (SiO2)

Banded gneiss (likely biotite-rich gneiss)

Gneiss; chiefly quartz, feldspar, biotite, and possibly hornblende

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Schist

Schist (various mineral compositions)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Rough Corundum (likely Sapphire/Zircon-bearing)

Aluminium Oxide (Al2O3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Thulite in Matrix

Pink Zoisite - Ca2Al3(SiO4)3(OH)

Greenstone / Greenschist

Greenschist facies metamorphic rock (composed primarily of chlorite, actinolite, and epidote)

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Gneiss (Schistose)

Gneiss

Serpentine

Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4

Quartz (Clear Quartz / Rock Crystal)

Silicon Dioxide (SiO2)

White quartz in dark matrix (likely quartz-bearing breccia or polished composite specimen)

Quartz, SiO₂, in an unidentified dark silicate matrix

Schist

Mica Schist

Raw selenite (gypsum)

Gypsum, CaSO₄·2H₂O; translucent variety selenite

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Quartz with Pyrite

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Gneiss with Orthoclase Feldspar

Gneissic Metamorphic Rock with K-Feldspar inclusions

Collection of Minerals and Ores

Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Red Jasper (Beach Pebble)

SiO2 (Microcrystalline Quartz with Hematite inclusions)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Quartzite with Quartz Veining

Metamorphic Quartzite (SiO2)

Quartz (Milky/Smoky Quartz)

Silicon Dioxide (SiO2)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Gneiss (with iron staining)

Gneiss

Gneiss (Hornblende/Biotite Gneiss)

Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)

Rounded sedimentary pebble, likely mudstone or shale

Argillite/mudstone; predominantly compacted clay minerals with quartz and iron oxides

Milky Quartz

Quartz / Silicon Dioxide (SiO2)