Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Vein Pebble

Silicon dioxide (SiO2)

Veined basalt (likely basalt with quartz/calcite vein)

Basalt, aphanitic mafic volcanic rock; vein minerals likely quartz (SiO₂) or calcite (CaCO₃)

Basalt (Vesicular or Porphyritic River Pebble)

Mafic Volcanic Rock (Aphanitic to Porphyritic Basalt)

Polished brecciated jasper

Jasper, opaque microcrystalline quartz (SiO₂), likely brecciated jasper with iron-oxide and dark silicate inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz (SiO₂), with iron-oxide inclusions

Quartz Druzy (Quartz Druse)

Silicon Dioxide (SiO2)

Basalt with Quartz Veining

Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions

Milky quartz (quartz-rich rock fragment)

Quartz, silicon dioxide (SiO₂)

Jasper Conglomerate

Jasper-clast Conglomerate (SiO2)

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Chert (Yellow Jasper/Quartzite Pebble)

Microcrystalline Silicon Dioxide (SiO2)

Beach Pebble (Basalt/Greywacke)

Amygdaloidal Basalt

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky quartz (likely weathered quartzite or quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Slate/Schist

Milky Quartz with Chlorite/Amphibite Inclusions

Silicon Dioxide (SiO2) with various mineral inclusions

Milky quartz (likely weathered quartz vein)

Quartz, silicon dioxide (SiO₂)

Jasper pebble with vein quartz cross-cutting fractures

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Quartz Vein in Schist / Gneiss Metamorphic Matrix

Silicon Dioxide (SiO2) in metamorphic schist host rock

Weathered quartz-rich rock, possibly granite or pegmatite fragment

Uncertain; likely quartz–feldspar aggregate, potentially granitic pegmatite

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Chert / Flint Tool

Cryptocrystalline quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Vein Rock

Silicon Dioxide (SiO2)

Quartz with Iron Oxide

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Rose Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Oxides

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Jasper (or possibly Agate/Chalcedony) beads

SiO2 (Silicon Dioxide)

Rounded pale quartz-rich pebble

Likely milky quartz or quartzite (SiO₂); exact identification is uncertain from the photograph

Kyanite in Quartz

Al2SiO5 in SiO2

Chert Pebble (with Quartz Vein)

Chert (Cryptocrystalline Silica - SiO2)

Yellow calcite crystal cluster with calcite fragment

Calcite, calcium carbonate (CaCO₃)

Red jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

Milky Quartz

Silicon dioxide (SiO2)

Pyrite with quartz

Pyrite (FeS₂) with quartz (SiO₂), possibly minor chalcopyrite

Chalcopyrite

Copper iron sulfide (CuFeS2)

Basalt with Quartz/Calcite Veins

Basalt with hydrothermal vein infill

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), possibly iron-bearing jasper