Metamorphic Mineral

Possible green glassy mineral pebble

Undetermined; possibly green aventurine (quartz) or another green mineral

Pyrite (Fools Gold)

Iron Disulfide (FeS2)

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Rough Apatite in Matrix

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

Quartz (Milky/Snow)

Silicon Dioxide (SiO2)

Pyrite in Matrix

Iron Disulfide (FeS2)

Quartzite with Quartz Veins

Metamorphic Quartzite (SiO2)

Feldspar

Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)

Garnet-bearing metamorphic rock, possibly garnet amphibolite or mica schist

Almandine garnet (Fe₃Al₂Si₃O₁₂) in a mafic, amphibole–feldspar-rich matrix

Blue Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Clear Quartz

Silicon Dioxide (SiO2)

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Green river-worn pebble, likely serpentinite

Serpentinite (serpentine-group minerals; identification is provisional from the photograph)

Greenschist (or Serpentinite with Manganese Dendrites)

Greenschist facies metamorphic rock

Garnet (Almandine-Pyrope)

Almandine-Pyrope Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3

Small quartz-rich pebble, possibly milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled green aventurine quartz

Aventurine quartz, silicon dioxide (SiO₂) with dispersed fuchsite or other mica inclusions

Corundum (Sapphire/Ruby in Matrix)

Aluminium oxide (Al2O3)

Yellow Aventurine (Yellow Quartz)

Silicon Dioxide (SiO2) with inclusions of Muscovite or Mica

Fuchsite

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Milky Quartz with Algae/Chlorite

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Peacock Ore

Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)

Limonite or Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Quartzite Pebble (with mineral veining)

Metamorphic Quartzite (SiO2)

Dumortierite Quartz

Dumortierite-bearing Quartzite (Al7BO3(SiO4)3O3 in SiO2)

Biotite-rich schist (probable mica schist)

Mica schist; predominantly quartz, biotite, and feldspar

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Almandine Garnet

Fe3Al2(SiO4)3

Banded gneiss

Gneiss, commonly quartz–feldspar–mica gneiss

Peacock Ore

Bornite (Cu5FeS4)

Banded gneiss pebble

Gneiss, likely quartz–feldspar–biotite gneiss

Epidote

Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))

River Stone (possibly Gneiss)

Metamorphic Gneiss

Schist

Schist (metamorphic rock)

Green aventurine quartz (probable)

Quartz, SiO₂, with fuchsite or other green mica inclusions

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Likely slate fragment

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Bismuthinite with Chalcopyrite and Quartz

Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)

Likely greenstone (metamorphosed mafic rock)

Greenschist or altered basalt; exact identification is uncertain from the image

Quartz

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)