Mineral And Metamorphic Rock

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Likely amphibolite

Amphibolite, composed mainly of hornblende and plagioclase feldspar

Moonstone

Orthoclase (KAlSi3O8) with Albite inclusions

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

Small pale mineral/rock fragment

Indeterminate; possibly weathered quartz, calcite, or light-colored limestone

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Vein in Host Rock

Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear quartz (likely quartzite-like tumbled quartz)

Quartz, silicon dioxide (SiO₂)

Weathered schist or gneiss fragment

Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

Banded dark pebble (likely gneiss or banded metamorphic rock)

Indeterminate from the image; possibly banded gneiss

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Green Quartz (Aventurine or Prase)

Silicon Dioxide (SiO2) with inclusions

Ruby in Zoisite

Anyolite (composite of Corundum and Zoisite)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Collection of Minerals and Ores

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

Quartz vein in weathered host rock

Quartz (SiO₂), likely in a weathered metamorphic or igneous matrix

Pebble

Clast (specifically a granule or small pebble)

Gneiss

Gneiss (SiO2-rich metamorphic rock)

Quartz-rich metamorphic rock, likely mica schist or gneiss

Quartz–feldspar–mica metamorphic aggregate; exact identification requires thin-section or field tests

Epidote (Greenstone)

Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Quartz

Silicon Dioxide (SiO2)

Dumortierite in Quartz

Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Clear Quartz

Silicon dioxide (SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Iron-stained garnet-bearing rock, possibly almandine garnet

Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Serpentinite with carbonate veins

Serpentinite; chiefly serpentine-group minerals (antigorite/lizardite, Mg₃Si₂O₅(OH)₄) with white calcite or magnesite veins

Rough quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Weathered quartz-rich rock fragment

Indeterminate; likely quartz-bearing granitoid or quartzite

Quartz Vein in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Quartz with Epidote / Serpentine (Vein Quartz)

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