Mineral In Metamorphic Rock

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Ruby in Zoisite

Anyolite

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Milky Quartz

Silicon Dioxide (SiO2)

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Epidote (Unakite component) / Green Quartzite

Ca2(Al,Fe)3(SiO4)3(OH)

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Likely serpentinite (serpentine-rich rock)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)

Serpentine

Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4

Quartzite Pebble

Metamorphic Rock (rich in SiO2)

Granite

Felsic intrusive igneous rock

Clear quartz crystal (likely quartz point or polished quartz)

Quartz, silicon dioxide (SiO₂)

Tiny amber-colored crystal fragment

Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral

Gneiss (probable banded metamorphic rock)

Banded gneiss; typically quartz–feldspar–mica assemblage

Almandine Garnet in Schist

Almandine, Fe3Al2(SiO4)3

Milky quartz

Quartz (silicon dioxide, SiO₂)

Unidentified gray rock/mineral specimen

Indeterminate; possibly quartz-rich rock or a metallic sulfide-bearing specimen

Mixed Tumbled Rocks and Minerals Collection

Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss (high-grade metamorphic rock)

Likely biotite-bearing schist or gneiss

Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica

Tiny rounded brown mineral grain

Indeterminate; possibly iron oxide, garnet, or a weathered sulfide grain

Green Aventurine

Aventurine Quartz (SiO2 + Cr-bearing Mica inclusions)

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (Metamorphic silicate rock)

Quartz

Silicon Dioxide (SiO2)

Granite Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartz Pebble (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Likely weathered quartz-rich rock, possibly granite or gneiss

Granite–gneiss assemblage; chiefly quartz, feldspar, and dark mica/amphibole

Quartz Vein in Siltstone

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

White Quartz

Silicon Dioxide (SiO2)

Biotite gneiss (probable)

Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar

Quartz with Schist Matrix

Crystalline Silicon Dioxide (SiO2) in micaceous schist

Gneiss

Gneiss (High-grade metamorphic rock)

Weathered schist or gneiss

Quartz–feldspar–mica metamorphic rock

Gneiss (River Cobble)

Gneiss

Quartzite (probable)

Quartz-rich metamorphic rock, composed mainly of SiO₂ quartz