Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Or Igneous
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Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Green Tourmaline (Verdelite) / Actinolite
Tourmaline group: Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH)4 / Actinolite: Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Quartz Boulder
Silicon Dioxide (SiO2)
mineral
Mica (Muscovite or Biotite)
Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Labradorite
(Na,Ca)(Al,Si)4O8
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Quartz
SiO2 (Silicon Dioxide)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Biotite on Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Strawberry Quartz (Quartz with Hematite inclusions)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Greenstone / Greenschist
Greenschist (containing Chlorite, Epidote, Actinolite)
metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Greenschist
Chlorite schist
metamorphic
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Magnetite / Hematite (Iron Ore)
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Garnet
Group of silicate minerals (e.g., Almandine: Fe3Al2(SiO4)3)
gemstone
Lapis Lazuli
(Na,Ca)8(Al,Si)12O24(S,SO4)(Cl)2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Crystalline Quartz (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
mineral
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Greenschist (or Serpentinite with Manganese Dendrites)
Greenschist facies metamorphic rock
metamorphic
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral