Igneous, Sedimentary, And Metamorphic Mix

Corundum (Sapphire/Ruby in Matrix)

Aluminium oxide (Al2O3)

Banded River Cobble with Mafic Dike

Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion

igneous and sedimentary

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3)

Citrine Quartz

Silicon Dioxide (SiO2)

Strawberry Quartz (Quartz with Hematite inclusions)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3

Dearest Ring (Gemstones)

Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)

Biotite on Matrix

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

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Metamorphic

Milky Quartz

Crystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Gneiss

Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Labradorite (tumbled)

Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)

Almandine Garnet

Fe3Al2(SiO4)3

Quartz

Quartz (SiO2, Silicon Dioxide)

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sedimentary or Metamorphic

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Quartzite

Quartzite (primarily SiO₂)

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).