Sedimentary (Man Made Conglomerate)

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

Quartz-rich conglomeratic rock (likely granitic breccia or conglomerate)

Uncertain; quartz–feldspar rock in a fine-grained matrix, possibly weathered granite or polymictic conglomerate

Conglomerate with Quartz Inclusions

Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)

Light-colored weathered rocks, possibly limestone or quartz-rich stone

Probable limestone/calcitic rock; exact identification is uncertain because strong flash overexposure obscures texture

Polymict conglomerate with a projecting pebble

Conglomerate; clast-supported polymict conglomerate, dominated by quartz/feldspar and lithic fragments in a cemented matrix

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Black beaded bracelet, likely black onyx or glass

Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass

River Pebble (Granite/Sandstone Pebble)

Rounded Quartz/Feldspar Gravel Clast

Quartz Pebble

Silicon Dioxide (SiO2)

Hag Stone

Perforated Quartz Pebble / Sedimentary Rock

Brecciated rock, likely polymict breccia

Polymict breccia; exact lithology cannot be determined from the image

Brecciated jasper or brecciated chert

Silica-rich breccia, chiefly microcrystalline quartz (SiO₂), with iron-oxide staining

Breccia

Clastic Breccia (General mineral composition depends on fragments, often SiO2 or CaCO3)

Puddingstone (Jasper-Conglomerate)

Conglomerate (Silicon Dioxide, SiO2 with impurities)

River Stone / Cobble

Polymictic lithic conglomerate or sandstone cobble

Puddingstone (Gowganda Tillite/Jasper Conglomerate)

Jasper Conglomerate (SiO2 primary composition)

Asphalt (Bituminous pavement fragment)

Artificial conglomerate / Bitumen-Aggregate mixture

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Puddingstone (Jasper Conglomerate)

Quartzite Conglomerate (SiO2 matrix with Jasper/Quartz pebbles)

Puddingstone (Gowganda Conglomerate)

Polymictic Conglomerate (SiO2 matrix with jasper and quartz inclusions)

River Pebbles

Polymictic Gravel

River Pebble (Gravel)

Rounded clastic sediment

Puddingstone (Jasper-Conglomerate)

Jasper Conglomerate (SiO2 matrix with Jasper clasts)

Puddingstone (Gowganda)

Jasper-clast Polymictic Conglomerate (Gowganda Formation)

River Gravel

Polymictic Gravel / Detrital Rock Aggregate

Gravel and Pebbles

Unconsolidated rock fragments (clastic sediment)

River Pebble (Granite / Sandstone Cobble)

Stream-rounded Rock Pebble

Grey River Pebble (Greywacke / Basalt)

Stream-rounded silicate rock pebble

River Pebble (Gravel)

Clastic sedimentary rock (likely Siltstone or Mudstone pebble; SiO2 with various impurities)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Sandstone or Weathered Conglomerate

Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)

Weathered conglomeratic river cobble

Polymictic conglomerate or breccia, likely matrix-supported

Hagstone (Adder Stone)

Chert or Sedimentary pebble with natural perforation

River Stone (River Pebble)

Rounded Sedimentary Rock (Lithic Clast)

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

Conglomerate with rounded carbonate clasts

Polymictic carbonate conglomerate; clasts likely limestone or coral-derived calcite (CaCO₃)

Quartz Pebble

Silicon Dioxide (SiO2)

Terrazzo (with Marble and Granite fragments)

Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates