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

Puddingstone (specifically Gowganda Tillite or St. Joseph Island Puddingstone)

Jasper Conglomerate

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Mixed River Pebbles and Rock Collection

Polymictic lithic conglomerate, sandstone, and quartz pebbles

Rounded reddish-brown pebble

Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

Quartz in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Porphyritic polymictic breccia (likely volcanic breccia)

Volcanic breccia; probable polymictic andesite–dacite breccia with quartz/feldspar clasts

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Float/Abraded)

Quartz (SiO₂)

Jasper with Quartz Vein

Microcrystalline quartz (SiO2) with impurities

Quartz-veined Siltstone

Siltstone with Quartz (SiO2) veins

Chert with Quartz Vein

Silicon dioxide (SiO2)

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Quartz-rich granitic rock, possibly pegmatite

Granite/pegmatitic granite; chiefly quartz (SiO₂), feldspar, and mica

Quartz Veined Siltstone or Graywacke

Clastic Sedimentary Rock with Quartz (SiO2) veining

Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz with Mica/Host Rock

Silicon Dioxide (SiO2) with Phyllosilicates

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Quartz Vein in Rhyolite

Silicon Dioxide (SiO2) in extrusive igneous rock

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

Quartz Pebble (Quartzite Pebble)

Silicon Dioxide (SiO2)

Green-and-gold apatite-bearing rock, possibly epidote skarn

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing

Vein Quartz in Basalt or Mafic Rock

Silicon Dioxide (Quartz veins in volcanic host rock)

Basalt with Quartz/Calcite Vein

Basalt (Mafic Volcanic Rock with secondary mineralization)

Quartz (Milky/Vein Quartz)

Silicon Dioxide (SiO2)

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Quartz on Sandstone

Silicon Dioxide (SiO2) in Lithic Sandstone

Quartz Vein in Hematitic Siltstone

Hydrothermal Quartz (SiO2) in Ferriferous Matrix

Quartz pebble

Silicon dioxide (SiO2)

Granite featuring Quartz Vein

Granite with hydrothermal silica (SiO2) intrusion

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Puddingstone (Quartzite Conglomerate with Jasper inclusions)

Metaconglomerate (Silicon Dioxide, SiO2)

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

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

Polished orbicular jasper / brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and clay-rich inclusions

Quartz Vein in Siltstone

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Quartz Vein in Basalt or Porphyry

Silicate-veined volcanic rock

Quartz pebble

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)