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

Greenish-gray quartz-rich rock, possibly weathered granite or quartzite

Provisional identification: quartz–feldspar aggregate; exact species cannot be confirmed from one photograph

Quartzite Pebble with Feldspar Vein

Quartzite (SiO2) with Feldspar (KAlSi3O8)

Quartz-veined Schist (or Metasandstone)

Metamorphic Rock with Quartz Veining (SiO2)

Red Jasper with Quartz Vein

Microcrystalline Quartz (SiO2) with Hematite inclusions

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Shale (possibly)

Shale (fine-grained clastic sedimentary rock)

Milky Quartz

Silicon Dioxide (SiO2)

Siltstone Pebble with Veining

Siltstone

Ferruginous Sandstone

Sandstone, Iron-rich

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

Polished red banded stone, likely rhodonite

Rhodonite — manganese inosilicate, MnSiO₃; possibly rhodochrosite or dyed quartz

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Rounded iron-rich pebble

Likely hematite/goethite-bearing quartzite or ironstone; exact identification requires testing

Wishing Stone with Quartz Vein

Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)

Asphalt Chunk (with aggregate)

Bituminous concrete / Anthropogenic conglomerate

Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz

Silicon Dioxide (SiO2)

Weathered vuggy quartz-rich rock (probable silicified limestone or quartz breccia)

Microcrystalline quartz (SiO₂) with calcite (CaCO₃), iron oxides, and minor clay minerals

Chert Pebble (with Quartz Vein)

Silicon Dioxide (SiO2)

River Pebble (likely Quartzite or Chert)

Silicon Dioxide (SiO2) crystal conglomerate

Weathered quartz-rich pebble (likely milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂); possibly quartzite, a metamorphic quartz rock

Quartz Vein Rock with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar

Asphalt (Road Aggregate)

Bituminous conglomerate

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Chert (Basanite variety) with Quartz Vein

Microcrystalline Quartz (SiO2)

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, possibly granitic gneiss

Quartz vein in dark host rock

Quartz (SiO₂), likely in basalt, gabbro, or altered mafic rock

Chert (Flint) with Quartz Vein

Silicon Dioxide (SiO2)

Unidentified dark reddish-brown rock or mineral specimen

Indeterminate from the blurred image; possibly iron-stained quartz, jasper, or a metallic sulfide-bearing rock

Jasper with Quartz Vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Rose Quartz

Silicon Dioxide (SiO2)

Jasper Conglomerate (Puddingstone)

Jasper Conglomerate (Siliceous Sedimentary Rock)

Banded calcite/aragonite mineral specimen (tentative)

Calcite (CaCO₃), possibly with aragonite or crystalline carbonate growth

Quartzite Conglomerate

Conglomerate (SiO2 rich)

Graywacke with Quartz Vein

Lithic Sandstone (Graywacke)

Clear Quartz Cluster

Quartz (Silicon Dioxide, SiO2)