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

Weathered quartz-bearing rock, possibly sandstone or quartzite

Provisional: quartzite (mostly SiO₂); could alternatively be iron-stained quartz sandstone

Basalt with Quartz Vein

Basalt (Mafic volcanic rock) with secondary Quartz (SiO2) intrusion

Brecciated Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Veined Quartzite / Vein-filled Sedimentary Rock

Siliciclastic rock with iron oxide-filled fractures

Quartz Vein in Basalt or Slate

Hydrothermal quartz vein traversing mafic host rock

Wishing Stone (Basalt/Metabasalt with Quartz-Feldspar Vein)

Veined Metabasalt / Veined Greywacke

Concrete rubble

Anthropogenic conglomerate

River Pebbles (Chert and Quartzite)

Sedimentary Clastic Rock (Silica-rich)

Conglomerate

Conglomeratic Sandstone

Chert with Quartz Vein

Microcrystalline Quartz (SiO2) with Macrocrystalline Quartz

Likely galena-bearing ore

Galena (PbS), possibly mixed with quartz or carbonate gangue

Conglomerate

Clastic sedimentary rock (composed mostly of SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Chert Breccia

Brecciated Chert (Microcrystalline Silica)

Quartz Vein in Host Rock

Silicon dioxide (SiO2) veins in metamorphic/igneous host rock

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Milky Quartz

Silicon Dioxide (SiO2)

Boxwork or Septarian Concretion

Septarian nodule / Boxwork weathering

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Basalt with Quartz Vein

Mafic Volcanic Rock with SiO2 intrusion

Unknown Tumbled Stone

Unknown (Too Blurry)

Conglomerate

Conglomerate (SiO2 matrix with varying clasts)

Pea Gravel / River Gravel

Unconsolidated Clastic Sedimentary Aggregate

Quartz

Silicon Dioxide (SiO2)

Weathered quartz-rich rock, possibly sandstone or quartzite

Indeterminate; likely quartz sandstone (SiO₂-rich), possibly weakly metamorphosed quartzite

Jasper with Quartz Veining

Silicon Dioxide (SiO2) with iron oxide impurities

Conglomerate

Clastic Sedimentary Conglomerate (SiO2 based clasts in matrix)

Quartz Pebble

Silicon Dioxide (SiO2)

Mixed river-worn rock and mineral collection

Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble

Conglomerate

Conglomerate (SiO2 dominant in clasts)

Veined Limestone (or Quartz-Veined Slate/Shale)

Metamorphosed Sedimentary Rock with Calcite/Quartz Veins

Quartz Vein Rock

Silicon Dioxide (SiO2)

Conglomerate

Conglomeratic Sandstone

Epidote with Quartz Vein

Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins

Altered mafic rock or Epidosite

Quartz Vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix

Orbicular jasper (picture jasper)

Silicified volcanic or sedimentary rock; chiefly microcrystalline quartz (SiO₂) with iron-oxide pigments

Quartzite with Quartz Vein

Metamorphosed Quartz-rich Sandstone (SiO2)

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert with Quartz Veins

Microcrystalline Quartz (SiO2)