Igneous, Sedimentary, Metamorphic, And Mineral

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Banded gneiss

Foliated silicate rock, typically quartz–feldspar–mica gneiss

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Hematite

Iron Oxide (Fe2O3)

Hematite

Iron Oxide (Fe2O3)

Hematite

Iron Oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Calcite

Calcite (Calcium Carbonate - CaCO3)

Blue Apatite

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

Blue Calcite

Calcium Carbonate (CaCO3)

Feldspar

Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Fragment

Quartz (Silicon Dioxide, SiO2)

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Clear fragment)

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline fragment)

Silicon Dioxide (SiO2)

Biotite Mica

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

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Garnet Amphibolite (or Garnet Gneiss)

Garnet amphibolite / Garnet-bearing metamorphic rock

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss

Raw selenite (gypsum)

Gypsum, CaSO₄·2H₂O; translucent variety selenite

Gneiss (Augen Gneiss)

Augen Gneiss

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Mica-rich Schist fragment

Mica Schist

Gneiss

Gneiss

Gneiss

Gneiss