Metamorphic, Likely Sedimentary With Quartz Veins

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

Milky quartz-rich vein rock

Quartz, SiO₂, likely massive or microcrystalline quartz

Milky quartz with iron-oxide staining

Quartz (silicon dioxide, SiO₂)

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz (Milky and Smoky variety)

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18)

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Beryl (likely Aquamarine or Heliodor variant)

Beryllium aluminum silicate (Be3Al2Si6O18)

Rough Quartz (likely Rose or Smoky variant)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Slate/Schist

Banded Quartzite River Pebble

Metamorphosed Quartz-rich Sandstone (SiO2)

Weathered quartz-rich pebble

Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar

Milky quartz

Quartz (silicon dioxide, SiO₂)

Clear Quartz

Silicon Dioxide (SiO2)

Milky quartz-rich rock

Quartz (SiO₂), likely massive milky quartz with minor iron-stained gangue

Gneiss with Quartz Vein

Gneiss (containing SiO2 vein)

Quartz-rich rock fragment, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly an iron-stained quartz vein fragment

Weathered schist or foliated metamorphic rock

Mica schist, possibly phyllite; exact identification requires a fresh surface and testing

Serpentinite-bearing quartz vein rock

Serpentinite (antigorite/lizardite) with milky quartz; possible chlorite or epidote alteration

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz-rich rock with chlorite/epidote vein

Milky quartz with green chlorite or epidote; exact identification requires testing

Tumbled milky quartz

Quartz, SiO₂

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Weathered schist or phyllite

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

Milky quartz with iron-oxide staining and matrix

Quartz, silicon dioxide (SiO₂), likely massive quartz

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Tumbled quartz-rich stone, likely milky quartz

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

Pyrite

Iron Sulfide (FeS2)

Chert / Jasper

Silicon Dioxide (SiO2)

Small rounded pebble, likely quartz-rich river stone

Indeterminate; likely quartz/chert-bearing lithic clast

Milky quartz (likely quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Quartzite and Milky Quartz River Pebbles

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz-bearing rock fragment

Likely quartz (SiO₂) with iron-oxide staining and possible host-rock grains

Milky quartz with iron-oxide staining

Quartz (SiO₂), likely ferruginous milky quartz

Tumbled gray-green metamorphic rock, likely serpentinite or chlorite schist

Serpentinite/chlorite-rich ultramafic metamorphic rock; commonly dominated by antigorite, lizardite, or chlorite with minor magnetite and talc

Polished white quartz-rich pebble

Microcrystalline quartz (SiO₂), likely milky quartz or quartzite

Tumbled honey calcite (likely)

Calcite, calcium carbonate (CaCO₃)

Quartz-veined metamorphic rock, likely greenschist or altered basalt

Chlorite–actinolite schist or metabasalt with a milky quartz vein