Metamorphic, Likely Sedimentary With Quartz Veins

Milky quartz (rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartzite Cobble with Quartz Vein

Metamorphic Quartzite (SiO2)

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂); probable quartzite if the specimen is a coherent rock

Milky quartz-rich vein rock

Quartz, SiO₂, likely massive or microcrystalline quartz

Quartz-rich rock, possibly milky quartz with iron staining

Quartz (SiO₂), likely with limonite/goethite inclusions and minor feldspar or carbonate

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Tumbled green epidote–quartz (probable)

Epidote, Ca₂(Al,Fe³⁺)₃(SiO₄)₃(OH), likely intergrown with quartz and/or chlorite

Tumbled quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly weathered chert or chalcedony

Foliated metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss, possibly migmatitic gneiss

Milky quartz (likely quartz-rich fragment)

Quartz, silicon dioxide (SiO₂)

Weathered quartz-rich rock, possibly iron-stained quartzite

Quartzite (predominantly SiO₂), tentatively; may instead be quartz vein material or chert

Milky quartz with iron-oxide staining

Quartz (silicon dioxide, SiO₂)

Quartz-rich metamorphic pebble

Milky quartz with possible feldspar and mica; likely quartzite or quartz-veined metamorphic rock

Quartz with Inclusions

Silicon Dioxide (SiO2)

Pyrite-bearing quartzite or sulfide-rich metamorphic rock

Quartz (SiO₂) with abundant pyrite (FeS₂), possibly minor mica or chalcopyrite

Milky quartz

Quartz (SiO₂), likely massive milky quartz

Likely milky quartz-bearing rock

Quartz, silicon dioxide (SiO₂), possibly in a quartz-rich vein or sugary quartzite

Quartz-rich rock fragment

Likely milky quartz (SiO₂), possibly a pale quartzite fragment

Milky quartz

Quartz (silicon dioxide, SiO₂)

Pink-and-green quartz-rich rock, likely rose quartz with epidote/serpentine

Quartz (SiO₂), variably colored by iron, with possible epidote, chlorite, or serpentine inclusions

Quartz-rich rock, likely milky quartz with iron-oxide staining

Quartz (SiO₂), possibly quartzite or a quartz vein fragment

Quartz (Smoky Quartz / Calcite)

SiO2 (Silicon Dioxide)

Quartz-rich stone, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly iron-stained or feldspar-bearing

Iron-stained milky quartz cluster

Quartz (SiO₂), with brown iron-oxide staining

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Quartz pebble

Quartz, SiO₂; likely a rounded vein-quartz clast

Rounded white pebble, likely limestone or marble

Calcite-rich carbonate rock; possibly micritic limestone (CaCO₃) or marble

Quartz

Silicon Dioxide (SiO2)

White Quartz Pebble

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (SiO2)

Milky quartz

Quartz (SiO₂), likely massive milky quartz

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂)

Weathered schist or phyllite

Mica schist/phyllite, likely quartz–mica-rich metamorphic rock

Fossil-bearing fine-grained sedimentary rock

Likely fossiliferous mudstone or shale; visible feature may be a plant fragment, trace fossil, or mineral vein

Milky quartz

Quartz (SiO₂), likely massive or vein quartz

Quartz-bearing metamorphic rock, likely schist or quartzite

Quartz (SiO₂) in a mica-rich metamorphic matrix

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

SiO2 (Silicon Dioxide)