Igneous And Mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Iron-stained Milky Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Arfvedsonite in Quartz (also labeled as Astrophyllite or Nuummite by collectors)

[Na][Na2][Mg4Fe2+](Si8O22)(OH)2 in SiO2

Granite

Granite (Mainly Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Feldspar

Potassium Feldspar (KAlSi3O8)

Quartz (Milky or Grainy Variety)

Silicon Dioxide (SiO2)

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Granite

Granite (Felsic Plutonic Rock)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss

Gneiss

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Quartz River Cobble

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Quartz Crystal (specifically Rock Crystal)

Silicon Dioxide (SiO2)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Pegmatitic Granite

Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)

Granite (with Orthoclase and Quartz)

Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)

Bumblebee Jasper

Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)

Yooperlite (Syenite clast containing fluorescent Sodalite)

Sodalite-bearing Syenite

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Grey Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Quartz Pebble (with Mica or Iron staining)

Silicon Dioxide (SiO2)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Vesicular Basalt with Xenocrysts

Mafic Igneous Plutonic/Extrusive Complex

Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)