Igneous Or Metamorphic

Biotite (Mica)

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

Basalt (Porphyritic)

Basalt (Mafic Extrusive Igneous Rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartz

Quartz (SiO₂)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Garnet (Almandine or Spessartine likely)

Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Quartz in Matrix (possibly with Biotite or Hornblende)

Quartz (Silicon Dioxide, SiO2) in Granitic Matrix

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)

Gneiss (with Quartz and Mica)

Gneiss

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8

River Quartz Pitting/Cobble

Silicon Dioxide (SiO2)

Garnet (Almandine/Pyrope)

Silicate Mineral (Group: X3Y2(SiO4)3 where X=Mg, Fe, Mn and Y=Al, Fe, Cr)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Sapphire (Raw/Rough)

Corundum (Al2O3)

Yellow Apatite Sphere (Polished)

Fluorapatite / Ca5(PO4)3F

Rough Corundum (likely Sapphire/Zircon-bearing)

Aluminium Oxide (Al2O3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Quartz (Peach/Orange variety)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Ruby

Corundum (Al2O3 with Chromium)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Labradorite

Labradorite, (Ca, Na)(Al, Si)4O8

Calcite

Calcium Carbonate (CaCO3)

Ruby

Corundum (Al2O3) with Chromium traces

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss

Gneiss