Mineral And Metamorphic Rock

Serpentinite

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly iron-stained massive quartz with minor feldspar or mica

Mica Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Green Aventurine in Host Rock

SiO2 (Quartz with Fuchsite inclusions)

Smoky Quartz (Tumbled)

Smoky Quartz (SiO2 - Silicon Dioxide)

Quartz (Citrine or Iron-Stained variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Green-and-gold apatite-bearing rock, possibly epidote skarn

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing

Light-colored quartz-rich stone, possibly milky quartz

Quartz (SiO₂), provisional identification

Quartzite

Quartzite (Primary mineral: SiO2)

Greenstone / Epidosite

Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)

Mixed River Stones and Minerals

Mixed Silica-rich Stones (Quartz, Agate, Jasper, Sandstone, Dalmation Stone)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Granite Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss

Gneiss

Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Gneiss

Gneiss

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Gneiss (likely)

Gneiss

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn)3Si2O5(OH)4

Banded Chalcedony (Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Gneiss (Cobble)

Gneiss

Metaconglomerate

Metaconglomerate (Quartzite conglomerate)

Quartzite River Rock with Dendrites

Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica banded rock

Gravel (Crushed Stone Aggregates)

Mixed Siliciclastic / Carbonate Aggregate

Quartz

Silicon Dioxide (SiO2)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Granite Gneiss

Felsic Gneiss

Iron-stained Quartzite

Metamorphosed Quartz (SiO2) with Hematite/Limonite impurities

Beach Pebble (Quartzite / Sandstone)

Quartz-rich sedimentary or metamorphic rock pebble

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss

Gneiss

Weathered quartz-rich pebble

Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar