Igneous

Granite

Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Dalmatian Stone

Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)

Mica-rich Pegmatite

Pegmatite (rich in Muscovite and Biotite)

Sodalite

Sodalite: Na8(Al6Si6O24)Cl2

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (with trace inclusions)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Chlorite/Moss Infusions

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Granite

Granite (a common term for a felsic intrusive igneous rock)

Sodalite

Na8(Al6Si6O24)Cl2

Dolerite (Diabase)

Dolerite / Diabase

Granite (with Almandine Garnet inclusions)

Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Granite Pebble

Felsic intrusive igneous rock

Pegmatite

Granitic Pegmatite

Epidote

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

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)

Yellow Agate

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Rose Quartz

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

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Sodalite

Na8(Al6Si6O24)Cl2

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)

Granite (Weathered River Rock)

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

Diorite (or salt-and-pepper granite pebble)

Phaneritic Igneous Rock (Intermediate Composition)

Labradorite (Larvikite variety)

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

Granite

Granite (Phaneritic intrusive igneous rock)

Snowflake Obsidian

Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)