Metamorphic, Likely Sedimentary With Quartz Veins

Iron-stained quartz (likely quartz-rich vein rock)

Quartz, SiO₂, with iron-oxide/hydroxide staining (limonite/goethite)

Weathered quartz-rich rock, possibly milky quartz in altered host rock

Milky quartz (SiO₂), with probable iron-oxide staining and a fine-grained host matrix

Pyrite cluster (iron pyrite)

Pyrite, FeS₂

Tumbled quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly quartzite or chalcedony-bearing stone

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Polished smoky quartz (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂); brown coloration may result from irradiation or iron-related staining/inclusions

Iron-stained weathered rock

Unknown

Quartz-rich rock fragment, possibly milky quartz with iron staining

Quartz (SiO₂), potentially vein quartz or quartz-bearing pegmatite

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

Tumbled quartz bead bracelet

Quartz (SiO₂), likely milky or rose quartz

Quartz crystal

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Milky quartz vein fragment

Quartz (SiO₂), likely massive or vein quartz with minor iron-oxide/clay inclusions

Likely quartz-rich rock (possibly milky quartz or quartzite)

Quartz-rich aggregate, predominantly silicon dioxide (SiO₂); exact identification is uncertain from the image

Tumbled white quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Quartz-veined Metamorphic Pebble

Silicate-rich metamorphic rock with quartz veins (SiO2)

Tumbled quartz pebble (probable)

Quartz, silicon dioxide (SiO₂), possibly milky quartz or quartz-rich river stone

Rounded pale quartz-rich stone (likely quartzite or milky quartz)

Quartzite, predominantly SiO₂; possibly massive milky quartz

Pyrite (likely)

Iron disulfide, FeS₂; commonly called fool’s gold

Likely raw quartz crystal fragment

Quartz (SiO₂), identification tentative from the image

Weathered quartz-rich rock fragment

Likely microcrystalline quartz with iron-oxide staining; exact identification is uncertain from the image

Tumbled yellow quartz pebble

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

Likely quartz pebble

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

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Likely quartz-rich pebble or weathered limestone fragment

Indeterminate; possibly microcrystalline quartz (SiO₂) or calcite-rich limestone (CaCO₃)

White Quartz

Quartz (SiO2)

Likely quartz-rich rock (milky quartz vein material)

Quartz, SiO₂; identification is provisional from the photo

Green Calcite

Calcium Carbonate (CaCO3)

Quartz-bearing metamorphic rock, possibly quartzite or hornfels

Mostly quartz (SiO₂), with probable iron-oxide and dark silicate minerals

Tumbled milky quartz

Quartz (SiO₂), likely translucent white variety

Quartz-rich rock, likely milky quartz with iron staining

Quartz (SiO₂), possibly a quartz vein fragment

Likely quartz-rich rock or mineral fragment

Quartz (SiO₂), possibly in a pegmatitic or granitic matrix

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Quartz-rich pebble, possibly milky quartz with dark inclusions

Quartz (silicon dioxide, SiO₂), likely with iron-oxide or mica inclusions

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂)

Iron-stained quartz-rich rock, possibly brecciated quartzite or rhyolite

Indeterminate quartz–feldspar rock with iron-oxide staining (SiO₂-rich; possible hematite/goethite)

Quartz with Mica Schist Matrix

Quartz (SiO2) in Mica Schist Matrix

Sandstone with Quartz Vein

Arenite with Quartz (SiO2) protrusion

Milky quartz-rich rock

Quartz (silicon dioxide, SiO₂), likely with mica or feldspar inclusions