Igneous And Mineral

White Agate (Chalcedony)

Agate (Silicon Dioxide - SiO2)

Sunstone

Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Banded Agate (Pink Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

White Quartz Pebbles

Quartz (Silicon Dioxide, SiO2)

Carnelian Agate

Carnelian (SiO2 with iron oxide impurities)

Pink Sapphire

Corundum (Al2O3 with Chromium/Titanium/Iron traces)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Yellowish)

Silicon Dioxide (SiO2)

White Agate (Chalcedony)

Silicon Dioxide (SiO2)

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Labradorite (a variety of Anorthosite or Plagioclase)

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

Obsidian (Arrowhead Lithic Tool)

Obsidian (Amorphous Volcanic Glass / SiO2 + inclusions)

Greenstone or Chlorite Schist

Greenschist / Chlorite schist

Basalt (Crushed Roadstone)

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Diorite

Diorite (intermediate intrusive igneous rock)

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Muscovite Mica (likely on Quartz/Feldspar)

Muscovite - KAl2(AlSi3O10)(OH)2

Orange Quartz (Citrine Quartz variety)

Silicon Dioxide (SiO2)

Basalt with Scoria/Vesicular Texture

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)

Red Rhyolite Porphyry

Rhyolite (Porphyritic texture)

Basalt with Olivine Phenocrysts

Porphyritic Basalt (containing Mg2SiO4 - Fe2SiO4)

Granite (tumbled pebble)

Granite (Plutonic Igneous Rock)

Quartz Pebble (Iron-Stained)

Quartz (Silicon Dioxide - SiO2)

Pyrite

Iron Disulfide (FeS2)

Fluorite

Calcium Fluoride (CaF2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)