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

Quartz-rich rock, likely milky quartz with iron staining

Quartz (SiO₂), possibly quartzite or quartz vein material

Quartz-rich breccia or pegmatitic granite fragment

Quartz–feldspar rock; possibly hydrothermal quartz breccia

Yellow jasper (likely ocean jasper or brecciated jasper)

Jasper, microcrystalline quartz (SiO₂) with iron-oxide staining and dark mineral veins

Rounded quartz-rich pebble

Quartz (SiO₂), possibly a quartzite or light-colored chert pebble

Weathered quartz-rich rock, possibly quartzite

Quartzite (mostly SiO₂), though the photograph is insufficient for confident identification

Conglomerate

Clastic Sedimentary Rock

Likely polished or naturally smoothed pebble with a pale mineral patch

Undetermined; possibly a dark volcanic rock with a quartz or feldspar inclusion

Quartz-rich breccia or silicified rock

Microcrystalline quartz (SiO₂), with iron-oxide staining and possible feldspar/calcite fragments

Brecciated jasper/chalcedony (iron-stained silica)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Weathered quartz-rich rock, possibly sandstone or milky quartz

Primarily quartz (silicon dioxide, SiO₂); exact identification is uncertain from the photograph

Weathered quartz-rich rock, possibly quartzite

Quartzite (tentative identification; exact rock type cannot be confirmed from the image)

Quartz Pebble

Silicon Dioxide (SiO2)

Conglomerate (Puddingstone)

Conglomerate (Clastic Sedimentary Rock)

Conglomerate

Conglomerate rock

Conglomerate

Conglomerate

Conglomerate

Sedimentary Conglomerate

Quartz Conglomerate

Quartz Conglomerate (clastic sedimentary rock)

Conglomerate (with Jasper pebble)

Conglomerate / Microcrystalline Quartz (Jasper)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate (River Rock Aggregate)

Conglomerate (Lithic-clast conglomerate)

Fossiliferous limestone

Bioclastic limestone (calcite-rich carbonate rock)

Tumbled quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony

Concrete-like aggregate surface with embedded rock fragments

Anthropogenic concrete or exposed aggregate; not a natural rock specimen

Quartz-rich rock, possibly milky quartz with iron staining

Predominantly silicon dioxide (SiO₂); exact rock type cannot be determined from the photo

Conglomerate

Conglomerate

Conglomerate

Conglomerate

Rounded quartz-rich pebble (likely vein quartz or quartzite)

Quartz, silicon dioxide (SiO₂); possibly quartzite if metamorphic

Conglomerate

Sedimentary Conglomerate

Conglomerate

Quartz Conglomerate

Quartz Veined Siltstone

Siltstone with Quartz (SiO2) intrusion

Conglomerate

Polymictic Conglomerate

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Brecciated Chert with Quartz Veining

Microcrystalline Quartz (SiO2) Breccia

Quartz vein rock

Milky quartz (SiO₂) in altered host rock, likely quartz-bearing hydrothermal breccia

Conglomerate

Conglomerate (Sedimentary Clastic Rock)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Conglomerate

Clastic sedimentary rock (Conglomerate)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Conglomerate

Conglomerate (clastic sedimentary rock)