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

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled white quartz or quartzite pebble

Quartz (SiO₂), possibly massive quartzite

Limestone with Quartz/Calcite Veins

Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)

Quartzite (River Pebble)

Metamorphic rock consisting primarily of Quartz (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Quartz vein in weathered host rock

Milky quartz (SiO₂), likely in a granitic or metamorphic matrix

Quartz

Quartz (SiO2 - Silicon Dioxide)

White limestone or chalky carbonate rock

Calcite-rich limestone; possibly chalk (CaCO₃)

Puddingstone (Jasper-Conglomerate)

Conglomerate (Silicon Dioxide, SiO2 with impurities)

Basalt with Quartz Vein

Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)

Likely chlorite-bearing schist (possibly greenschist)

Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar

Chert (Arrowhead Preform or Point)

Chert (Microcrystalline Quartz, SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Puddingstone (Jasper Conglomerate)

Quartzite Conglomerate (SiO2 matrix with Jasper/Quartz pebbles)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline SiO₂; possibly milky quartz

River Cobble (Quartzite/Granite mix)

Quartzite-rich river stone

Polished brown jasper (likely ocean or brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂); possibly quartzite, a recrystallized quartz sandstone

Quartzite with Iron Oxide Vein

Metamorphic Quartzite (SiO2 with Hematite/Limonite impurities)

Quartz (likely) or a Quartzite Pebble

Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.

Quartz Veined Diorite or Basalt

Crystalline Silicon Dioxide (Quartz) in Mafic Igneous Host (Basalt/Diorite)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Fragmented Sedimentary Pebble

Clastic Sedimentary Specimen

Shale or Slate with Quartz Veins

Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Quartz with Mafic/Chlorite Veins

Silicon Dioxide (SiO2) with Chlorite/Epidote cross-veining

Basalt with Quartz Veins

Basalt (complex silicate) with Quartz (SiO2) intrusions

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Altered Host Rock

Amethyst-bearing quartz cluster

Quartz, SiO₂; purple coloration from irradiation and trace iron

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

River Pebble

Weathered Sedimentary Rock Fragment

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Veined Grey Metamorphic Pebble

Quartzo-feldspathic vein in Metabasalt / Serpentinite / Slate

Graywacke Pebble with Quartz Vein

Argillaceous Sandstone (Graywacke)

Granite Pebble

Granite (Plutonic Igneous Rock)

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2) with various iron-oxide inclusions