Granite

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (among River Rock)

Quartz (Silicon Dioxide, SiO2)

Quartz / Vein Quartz

Quartz (Silicon Dioxide, SiO2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz vein fragment)

Silicon Dioxide (SiO2)

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

Gneiss

Gneiss (Metamorphic high-grade)

Granitic Gneiss

Gneiss (Polymetamorphic Granitic Gneiss)

Muscovite Mica (in Quartz matrix)

Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)

Smoky Quartz with Feldspar

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

Quartz

Silicon Dioxide (SiO2)

Granitic Pegmatite with Schorl Tourmaline

Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Labradorite (Larvikite variety)

(Na,Ca)(Al,Si)4O8 (Plagioclase Feldspar)

Granite (Weathered River Rock)

Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Labradorite (Larvikite variety)

Feldspar (Plagioclase series), (Na,Ca)(Si,Al)4O8

Amygdaloidal Rhyolite

Rhyolite (felsic volcanic rock) with amygdules

Porphyritic Rhyolite (Red Rhyolite)

Rhyolite (Porphyry)

Gneiss (specifically Biotite Gneiss)

Gneiss (high-grade metamorphic rock primarily composed of Silicates)

Greenschist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Gabbro

Phaneritic Mafic Igneous Rock

Granitic Pegmatite

Granitic Pegmatite with Quartz and Feldspar

Arfvedsonite in Quartz (also known as Eudialyte/Garnet Syenite variety)

Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2] within a silicate matrix

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Amazonite

K(AlSi3O8)

Aquamarine (Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Iolite (Cordierite)

Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18

Amazonite

Microcline (KAlSi3O8) with trace lead (Pb) impurities

Quartz (Crystal Fragment)

Quartz / Silicon Dioxide (SiO2)

Quartz with Mica (Pegmatite)

Quartz (SiO2) and Muscovite (KAl2(AlSi3O10)(OH)2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear/White Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble (Milky and Gray)

Quartz (Silicon Dioxide, SiO2)

Granite (with Muscovite Mica)

Phaneritic Felsic Igneous Rock (primarily Quartz SiO2, K-Feldspar KAlSi3O8, and Muscovite KAl2(AlSi3O10)(OH)2)

Granodiorite (or Granite) Pebble

Phaneritic Felsic Igneous Pebble