Metamorphic Rock

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Quartzite Pebble

Quartzite (primarily SiO2)

Granite (Background) and Quartzite/River Pebble (Foreground Heart)

Phaneritic Felsic Igneous Rock (Granite background)

Quartzite (River-worn Shiner)

Quartzite (Formula: SiO2)

Greenschist / Migmatite

Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)

River Rock (Basalt)

Aphanitic Basaltic Rock

Greenstone

Greenschist / Greenstone (contains epidote, chlorite, and actinolite)

Quartz Geode

Silicon Dioxide (SiO2) in Geode form

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Orange Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Granitic Pegmatite

Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Schist

Mica Schist

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Muscovite Schist with Quartz

KAl2(AlSi3O10)(OH)2 in Schistose matrix

Sandstone with Concretions / Liesegang Rings

Arenite with iron oxide banding

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Yellow Aventurine

Silicon Dioxide (SiO2) with inclusions

Magnetite / Iron Ore

Magnetite (Fe3O4)

Sodalite

Na8(Al6Si6O24)Cl2

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

Granite

Granite

Quartz (Milky and Smoky variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Soapstone (Talc-Schist)

Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)

Biotite Mica

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

Quartzite

Quartzite (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Mica Schist (with Muscovite)

Muscovite/Quartz Schist (KAl2(AlSi3O10)(OH)2)

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Red Tiger's Eye beads

Tiger's Eye (variety of Chalcedony, SiO2)

Greenschist

Greenschist (Chlorite Schist)

Clear Quartz Crystal (Herkimer Diamond style)

Silicon Dioxide (SiO2)

Sandstone (with Iron concretions/staining)

Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)