Mineral And Sedimentary

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Likely milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Quartz-rich rock, likely milky quartz vein material

Mostly quartz (SiO₂); exact rock type cannot be determined from the image alone

Quartz-rich rock or quartz specimen

Quartz (SiO₂), likely massive quartz or quartz-bearing host rock

Specular Hematite

Iron(III) oxide (Fe2O3)

Likely quartz-rich pebbles

Quartz (SiO₂), possibly milky quartz or quartzite; identification is uncertain from the blurry image

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Clear quartz crystal fragment

Quartz, silicon dioxide (SiO₂)

Milky quartz-rich rock

Quartz, SiO₂; possibly quartzite or massive vein quartz

Milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled white quartz

Quartz (silicon dioxide, SiO₂)

Quartz vein in weathered host rock

Quartz (SiO₂), likely in a weathered metamorphic or igneous matrix

Quartz pebble

Quartz, SiO₂; likely a rounded vein-quartz clast

Tumbled quartz (likely milky/clear quartz)

Quartz, silicon dioxide (SiO₂)

White quartz fragment

Quartz (silicon dioxide, SiO₂)

Clear quartz crystal (likely quartz bead/specimen)

Quartz, silicon dioxide (SiO₂)

Likely rough quartz fragment

Quartz (SiO₂), possibly iron-stained or included quartz

Iron-stained quartz

Quartz (SiO₂), colored by iron-oxide staining

Small quartz fragment (probable)

Quartz, SiO₂

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Hematite

Iron (III) Oxide (Fe2O3)

Likely tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Likely iron-stained quartz or quartzite

Quartz (SiO₂), possibly quartzite; yellow-brown coloring likely from iron oxides

Small translucent quartz pebble

Quartz (silicon dioxide, SiO₂), possibly milky or chalcedonic quartz

Tumbled quartz (likely rose or milky quartz)

Quartz, silicon dioxide (SiO₂)

Tumbled quartz pebble (probable)

Quartz, silicon dioxide (SiO₂)

White quartz pebble

Quartz (SiO₂), likely milky quartz

Weathered quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide staining

Quartz fragment

Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz

Peach/orange calcite cluster

Calcite (CaCO₃), likely botryoidal or scalenohedral aggregate

Pyrite

Iron Disulfide (FeS2)

Blue-green calcite (likely aragonite or apatite alternative)

Calcite, CaCO₃

Magnetite-rich ironstone

Magnetite, Fe₃O₄, likely in a dense ironstone matrix

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Hematite (likely Botryoidal or Specularite variant)

Iron(III) oxide (Fe2O3)

Quartz vein specimen

Quartz (SiO₂), likely drusy or massive quartz on host rock

Hematite

Ferric Oxide (Fe2O3)

Hematite

Iron Oxide (Fe2O3)

Rough Diamond (or Quartz Crystal)

Carbon (C) [if Diamond] / Silicon Dioxide (SiO2) [if Quartz]

Calcite crystal cluster

Calcite, calcium carbonate (CaCO₃)

Milky quartz

Quartz (silicon dioxide, SiO₂)