Igneous Or Mineral

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Granite

Intrusive igneous rock

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Magnetite (Lodestone)

Magnetite (Fe3O4)

K-Feldspar (Potassium Feldspar / Pink Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Granite

Intrusive Igneous Rock

White Topaz

Al2SiO4(F,OH)2

Gabbro

Gabbro (Mafic Plutonic Rock)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Orthoclase Feldspar (Granitic)

KAlSi3O8 (Potassium Feldspar)

Granite

Intrusive Igneous Rock

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Granite

Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz pebble

Silicon dioxide (SiO2)

Magnetite (potentially Hematite-rich)

Magnetite (Fe3O4)

Epidote-bearing Rock

Epidote / Silicate mineral aggregate

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Granite Boulder

Intrusive Igneous Rock

Gabbro or Diorite with Felsic intrusion

Mafic to intermediate intrusive igneous rock with felsic vein/inclusion

Granite

Felsic intrusive igneous rock

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Tumbled blue stone, possibly sodalite or blue quartz

Indeterminate from the photograph; possibilities include sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue quartz (SiO₂)

Magnetite

Magnetite (Fe3O4)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Granite with Pyrite or Mica

Phaneritic intrusive igneous rock

Hematite (likely Botryoidal or Specularite variant)

Iron(III) oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Blue Chalcedony

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Apatite

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

Hematite

Iron Oxide (Fe2O3)

Granite

Felsic intrusive igneous rock

Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Milky Quartz

Silicon Dioxide (SiO2)

Granite or Pegmatite in host rock

Granitoid / Felsic Intrusive Rock

Granite Pebble

Intrusive Igneous Rock

Quartz Mineral

Silicon Dioxide (SiO2)

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)

Mixed Silicates and Sulfides (SiO2, FeS2)

Pyrite

Iron Disulfide (FeS2)