Metamorphic And Sedimentary

Milky quartz in weathered host rock

Quartz, SiO₂; likely a quartz vein in altered country rock

Quartz vein in host rock

Quartz (SiO₂), with possible feldspar or carbonate-bearing matrix

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz with iron staining

Quartz (SiO₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Quartz vein fragment

Milky quartz (SiO₂), possibly with weathered host rock

Quartz

Quartz (SiO2 - Silicon Dioxide)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Polished gray pebble, likely quartzite or chert

Quartzite (mostly SiO₂), tentative identification

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Likely weathered quartz-rich rock fragment

Uncertain; possibly quartz-bearing granitic or metamorphic material (SiO₂-dominant)

Quartz

Silicon dioxide (SiO2)

Quartz

Quartz (SiO₂)

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Small pale mineral fragment

Unidentified; possibly quartz, calcite, or feldspar

Weathered quartz-rich pebble, possibly granite or granodiorite

Felsic intrusive rock; chiefly quartz, feldspar, and minor mica/amphibole

Blue Apatite

Calcium phosphate fluoride, Ca5(PO4)3(F,Cl,OH)

Quartzite Pebbles with Quartz Veining

SiO2 (Silicon Dioxide with country rock matrix)

Clear Quartz

SiO2 (Silicon Dioxide)

Mica

Mica group (often Muscovite or Biotite)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Pink Quartz

Silicon Dioxide (Quartz), SiO2

Jasper (Green Jasper/River Stone)

Silicon Dioxide (SiO2) with impurities

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Magnetite

Iron(II,III) oxide, Fe3O4

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))